{"version":"1.0.0","episode":{"title":"Normalization of Deviance: The Challenger Disaster and How Shop Standards Drift [E236]","url":"http://getcarcurious.com/episodes/normalization-of-deviance-the-challenger-disaster-and-how-shop-standards-drift-e236","audioUrl":"https://episodes.captivate.fm/episode/53237295-3ad8-4e6e-a97b-ab2c157c31ea.mp3","description":"Thanks to our Partners, Pico Technology, Autel, and Independent Wrench JobsWatch Full Video EpisodeMatt Fanslow revisits the Challenger disaster, not just as a historical tragedy, but as a case study in how standards, tolerances, and risk perception can shift over time. The common simplified story is that management ignored engineers, pushed the launch forward, and disaster followed. While that is part of the story, Matt looks at the deeper concept sociologist Diane Vaughan identified: normalization of deviance.The Challenger disaster happened 73 seconds after launch in 1986, killing all seven astronauts onboard. The failure was traced to O-rings in the solid rocket boosters that lost sealing ability in unusually cold conditions. But the broader lesson is not simply that one part failed. It is that warning signs had appeared before, yet each successful mission expanded the boundary of what NASA considered acceptable. What would have once been treated as outside tolerance gradually became normal.Matt connects this idea to the phrase, “slowly, then all at once,” often used to describe the collapse of relationships, marriages, systems, and businesses. The visible failure may seem sudden, but the conditions that made it possible usually developed over a long period of tolerated drift.From there, the discussion moves into automotive repair. Shops can experience the same pattern with ADAS calibrations, wheel torque procedures, tire repairs, safety glasses, uniforms, training expectations, and other operating standards. A procedure gets missed once. Nothing bad happens. It gets missed again. Still nothing bad happens. Eventually, the shop no longer treats the original standard as the standard at all. The absence of immediate consequences becomes false evidence that the deviation is safe.Matt uses ADAS calibration as a major example. A shop may begin by following OEM procedures after alignments or repairs, but over time, scheduling problems, delays, cost pressure, or customer pushback can lead to skipped calibrations. If no warning lights appear and no customer complains, the skipped step starts to feel acceptable. But that does not mean the risk disappeared. It may simply mean the failure has not happened yet.The episode also references tire repair liability and the John Eagle collision repair case as examples of what can happen when accepted industry habits conflict with OEM procedure. The lesson is not that every shop owner or technical specialist who drifts from procedure is malicious. The more uncomfortable lesson is that drift is natural. That is exactly why it has to be recognized and managed.Matt closes by encouraging listeners to look around their own shops and ask where tolerance has expanded without conscious approval. Are torque procedures still being followed? Are retorques still being performed? Are safety practices still enforced? Is training still treated as essential? Are customer-facing and liability-related procedures being maintained, or have they quietly become optional?Key ThemesNormalization of deviance: The gradual process where unacceptable practices become accepted because nothing bad happens immediately.Challenger as a system failure: The O-ring failed physically, but the larger failure involved shifting standards, repeated warning signs, and expanded tolerance.“Slowly, then all at once” Major failures often appear sudden, but the underlying drift usually develops over time.Automotive examples: ADAS calibrations, tire repairs, torque sticks, wheel retorques, safety glasses, uniforms, training, and shop SOPs can all become vulnerable to tolerance drift.OEM procedures and liability: The episode reinforces the importance of following documented procedures, especially where safety, liability, and driver-assistance systems are involved.Not always malicious: Deviance can become normalized without anyone consciously deciding to take a major risk.Memorable Ideas“What would have failed in 1981 passes in 1986.”“The tolerance for acceptability expanded.”“It happened slowly and then all at once.”“It’s not a problem until it is, and then it’s a big problem.”“The absence of consequences is not the same thing as proof of safety.”Listener TakeawayEvery shop has standards that were created for a reason. Some protect quality. Some protect the customer. Some protect the business. Some protect people’s lives. The danger is that those standards can erode so gradually that no one notices until the failure is already public, expensive, or irreversible.Thanks to our Partner, Pico TechnologyAre you chasing elusive automotive problems? Pico Technology empowers you to see what's really happening. Their PicoScope oscilloscopes transform your diagnostic capabilities. Visit PicoAuto.comThanks to our Partner, AutelFrom drivability diagnostics and TPMS service to ADAS and advanced safety systems, Autel helps technicians follow OEM procedures and repair with confidence. Learn more at Autel.comThanks to our Partner, Independent Wrench JobsIndependent Wrench Jobs is a new, tech-only community to help you find better independent shops—fair dispatch, steady work, real leadership. No games.Built by Technician Find—serving the industry since 2017. Join free at IndependentWrenchJobs.comContact InformationEmail Matt: mattfanslowpodcast@gmail.comDiagnosing the Aftermarket A - Z YouTube ChannelThe Automotive Repair Podcast Network: https://automotiverepairpodcastnetwork.com/Remarkable Results Radio Podcast with Carm Capriotto: Advancing the Aftermarket by Facilitating Wisdom Through Story Telling and Open Discussion. https://remarkableresults.biz/Business by the Numbers with Hunt Demarest: Understand the Numbers of Your Business with CPA Hunt Demarest. https://huntdemarest.captivate.fm/The Auto Repair Marketing Podcast with Kim and Brian Walker: Marketing Experts Brian & Kim Walker Work with Shop Owners to Take it to the Next Level. https://autorepairmarketing.captivate.fm/The Weekly Blitz with Chris Cotton: Weekly Inspiration with Business Coach Chris Cotton from AutoFix - Auto Shop Coaching. https://chriscotton.captivate.fm/Speak Up! Effective Communication with Craig O'Neill: Develop Interpersonal and Professional Communication Skills when Speaking to Audiences of Any Size. https://craigoneill.captivate.fm/"},"annotations":[{"startTime":321.9,"endTime":328.0,"type":"concept","title":"probability of failure","url":"/glossary/probability-of-failure","quote":"somebody presented them a paper that said, this is the probability of failure. And they looked at that and said, that's worth it. Go.","canonicalId":"concept:probability-of-failure","priority":0.35,"confidence":0.7,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Probability of failure is a quantitative estimate of how likely a system or component is to fail under given conditions. The speaker contrasts using that number to make a decision versus the reality that teams can still drift into accepting outcomes that the data warned against.","simplifiedExplanation":"Probability of failure is a way of saying how likely something is to break or go wrong. The segment’s point is that even when people see those numbers, they may still decide to proceed as if it won’t happen."}},{"startTime":336.5,"endTime":352.0,"type":"concept","title":"normalization of deviance","url":"/glossary/normalization-of-deviance","quote":"And what Diane Vaughan found was something that I think was named, she named it perhaps or coined the term or invented, if you will, something called normalization of deviance. And that may sound all super fancy, but you start thinking about it.","canonicalId":"concept:normalization-of-deviance","priority":0.85,"confidence":0.95,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Normalization of deviance is a process where small rule-breaking or safety issues become accepted over time. As nothing catastrophic happens immediately, teams gradually expand what they consider “acceptable,” so problems that should trigger action start being treated as normal.","simplifiedExplanation":"It’s when a team keeps letting small problems slide because they don’t seem to cause disaster right away. Over time, those problems become “normal,” even though they’re warning signs."}},{"startTime":359.7,"endTime":367.6,"type":"concept","title":"risk management","url":"/glossary/risk-management","quote":"And what it is, is it isn't straight up risk management. It's not. I'm looking at this data and it screams warning, warning, warning. I'll do it anyways.","canonicalId":"concept:risk-management","priority":0.45,"confidence":0.75,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Risk management is the structured process of identifying hazards, estimating how likely they are, and deciding whether the remaining risk is acceptable. In the segment, the speaker argues the situation wasn’t truly risk management because the team acted despite warning signals and probability-of-failure data.","simplifiedExplanation":"Risk management is basically “spot the danger, estimate how bad it could be, and decide if it’s worth doing.” The point here is that the decision wasn’t really careful risk management—it ignored the warnings."}},{"startTime":392.4,"endTime":411.2,"type":"term","title":"O-ring issues","url":"/glossary/o-ring-issues","quote":"They knew about O-ring issues. There were signs of issues, many missions, many missions. They knew there were issues, but nothing bad happened.","canonicalId":"term:o-ring-issues","priority":0.6,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"An O-ring is a rubber sealing ring used to prevent pressure or fluid leaks. “O-ring issues” refers to failures or degraded sealing performance—often tied to material condition and operating conditions—so the seal stops doing its job.","simplifiedExplanation":"An O-ring is like a rubber gasket that helps keep things sealed and leak-free. If there are O-ring issues, it means that seal isn’t working properly, which can let dangerous leaks happen."}},{"startTime":474.36,"endTime":480.7,"type":"car","title":"Dodge Challenger","url":"/cars/dodge/challenger","image":"https://upload.wikimedia.org/wikipedia/commons/0/0e/%2772_Dodge_Challenger_%28Rigaud%29.jpg","quote":"...y and then all at once. That's what happened with Challenger. Not the O-ring itself, failing, failing, failing...","canonicalId":"car:dodge:challenger","priority":0.7,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"The Dodge Challenger is a performance-focused muscle car known for its powerful engines and long-running popularity in the American market. In a podcast about diagnosing issues, it may come up as an example of how a problem can seem to worsen gradually before failing all at once. The mention of “failing, failing, failing” suggests the discussion is tied to a specific failure mode or component behavior rather than routine wear.","simplifiedExplanation":"The Dodge Challenger is a car built for strong acceleration and performance. The podcast is describing a problem that seems to get worse over time and then suddenly stops working. That kind of pattern can help diagnose what part is failing.","imageAttribution":"Wikimedia Commons / Public domain"}},{"startTime":538.3,"endTime":555.1,"type":"topic","title":"Challenger disaster","url":"/glossary/challenger-disaster","quote":"Challenger explodes because of a normalization of deviance. Now let's look at shops","canonicalId":"topic:challenger-disaster","priority":0.35,"confidence":0.85,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"The episode uses the Challenger disaster as a real-world example of how organizational shortcuts can compound. It’s referenced to connect human factors and process drift to technical outcomes in high-stakes systems.","simplifiedExplanation":"They’re referencing the Challenger disaster to show how small problems can build up. The point is about how procedures and standards can slip over time."}},{"startTime":555.1,"endTime":647.84,"type":"concept","title":"shop standards drift","url":"/glossary/shop-standards-drift","quote":"Now let's look at shops and the one I think most would be thinking about is ADOS. ... And then another one, like we can't get them in.","canonicalId":"concept:shop-standards-drift","priority":0.5,"confidence":0.75,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"“Shop standards drift” describes how procedures degrade over time—often through repeated small exceptions—until the shop no longer follows the manufacturer’s required workflow. The episode uses the calibration-after-alignment example to show how missing steps can become normalized.","simplifiedExplanation":"It means a shop’s process slowly gets worse over time. Small shortcuts start to feel acceptable, and eventually the important steps get skipped."}},{"startTime":579.0,"endTime":593.9,"type":"term","title":"wheel alignment","url":"/glossary/wheel-alignment","quote":"Because I don't think it starts out where a shop is doing wheel alignments on cars that explicitly state that certain calibrations must be done afterwards, an Audi.","canonicalId":"term:wheel-alignment","priority":0.6,"confidence":0.85,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"A wheel alignment adjusts the suspension angles (like camber, caster, and toe) so the tires contact the road correctly. The episode emphasizes that after an alignment, some cars require additional calibrations to match the new geometry.","simplifiedExplanation":"Wheel alignment is adjusting the angles of your wheels so the tires wear evenly and track straight. Some cars also need a reset/calibration after the alignment is changed."}},{"startTime":586.9,"endTime":607.1,"type":"term","title":"calibrations","url":"/glossary/calibrations","quote":"These calibrations should be done per the manufacturer after a wheel alignment that adjusts thrust line. Okay, well, they start out, they do it.","canonicalId":"term:calibrations","priority":0.65,"confidence":0.75,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"In modern cars, “calibrations” are software/parameter updates that teach control systems the car’s current alignment and sensor baseline. After a wheel alignment changes thrust/steering geometry, the manufacturer may require these calibrations so systems like steering-angle-related functions remain accurate.","simplifiedExplanation":"Calibrations are the car’s “settings updates” after work is done. If the wheels are adjusted but the car isn’t told the new baseline, some systems can be off even if nothing feels wrong right away."}},{"startTime":589.9,"endTime":593.9,"type":"term","title":"thrust line","url":"/glossary/thrust-line","quote":"These calibrations should be done per the manufacturer after a wheel alignment that adjusts thrust line.","canonicalId":"term:thrust-line","priority":0.55,"confidence":0.7,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Thrust line is the direction the vehicle’s rear wheels effectively “push” the car, based on rear wheel alignment. If the thrust line isn’t corrected or if the car isn’t recalibrated afterward, the steering can feel off and alignment-related sensors can be inconsistent with the actual geometry.","simplifiedExplanation":"Thrust line is basically the direction the car is being pushed by the rear wheels. If it’s not set correctly (or the car isn’t updated to match), the steering may not line up with where the car is actually going."}},{"startTime":600.7,"endTime":607.1,"type":"term","title":"mobile tech","quote":"they sublet it, they bring in a mobile tech, whatever, mobile company, send it to the dealer, they get them done.","canonicalId":"term:mobile-tech","priority":0.45,"confidence":0.6,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"A “mobile tech” is a technician or service that comes to the shop or customer location instead of performing the work at a dealership. In this context, the episode highlights how outsourcing calibrations can create process gaps if the follow-up step is missed.","simplifiedExplanation":"A mobile tech is a mechanic who does the work at your location instead of you going to a shop. The episode’s point is that outsourcing can still lead to steps being skipped."}},{"startTime":607.1,"endTime":613.6,"type":"term","title":"warning lights","url":"/glossary/warning-lights","quote":"And then there's one that slips through the cracks. They don't get it done. No warning lights, no complaints, five star review, customer may be paid for the calibration didn't get done.","canonicalId":"term:warning-lights","priority":0.4,"confidence":0.65,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"“Warning lights” are dashboard indicators triggered by a vehicle’s onboard diagnostics (for example, when sensors or calibration states are out of range). The episode notes that a calibration can be missed without immediately triggering warning lights, which makes the failure harder to catch early.","simplifiedExplanation":"Warning lights are the dashboard messages that tell you something is wrong. The episode’s point is that sometimes you won’t get any warning right away even if a required calibration wasn’t done."}},{"startTime":689.1,"endTime":704.5,"type":"concept","title":"tire plugging","quote":"other than really tire plugging or straight up patching, not the plug-in patches or plug-in seals, whatever they call them, patch plugs, the actually authorized way to repair a tire.","canonicalId":"concept:tire-plugging","priority":0.3,"confidence":0.65,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Tire plugging is a repair approach where a rubber plug is inserted into a puncture to seal it. It’s often considered less robust than a proper inside patch for many puncture types/locations, which is why shops and standards distinguish between plug-only repairs and approved repairs."}},{"startTime":696.7,"endTime":727.7,"type":"term","title":"patch plugs","url":"/glossary/patch-plugs","quote":"other than really tire plugging or straight up patching, not the plug-in patches or plug-in seals, whatever they call them, patch plugs, the actually authorized way to repair a tire.","canonicalId":"term:patch-plugs","priority":0.35,"confidence":0.7,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Patch plugs are a tire repair method where a plug is inserted into the puncture and a patch seals the area from the inside. Whether it’s appropriate depends on puncture location and size; using the wrong method can compromise sealing and lead to failure.","simplifiedExplanation":"Patch plugs are a way to fix a punctured tire by sealing it from inside and plugging the hole. Not every puncture is safe to repair this way—location matters."}},{"startTime":740.9,"endTime":747.32,"type":"car","title":"Honda Fit","url":"/cars/honda/fit-ev","image":"https://upload.wikimedia.org/wikipedia/commons/1/1e/Honda_Fit_EV_concept_%285213952298%29.jpg","quote":"...a collision shop. The vehicle, I believe it was a Honda Fit, was in a collision, the collision shop repaired ...","canonicalId":"car:honda:fit ev","priority":0.7,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"The Honda Fit EV is an electric version of the Honda Fit, designed to use a battery and electric drive instead of a gasoline engine. It’s mentioned in the context of a collision repair, which is important because EVs have high-voltage components that require careful inspection and correct repair procedures. Discussions like this often focus on how damage and repairs can affect systems beyond just the bodywork.","simplifiedExplanation":"The Honda Fit EV is a small electric car based on the Fit. The podcast is talking about a collision repair, which matters because electric cars have special high-voltage parts that must be handled correctly. If those parts aren’t repaired or checked properly, the car can have problems later.","imageAttribution":"Wikimedia Commons / CC BY-SA 2.0"}},{"startTime":755.4,"endTime":790.3,"type":"term","title":"adhesive","url":"/glossary/adhesive","quote":"they used what would be deemed a very industry accepted appropriate way to install a new roof by adhesive.\n...They adhered it.","canonicalId":"term:adhesive","priority":0.55,"confidence":0.75,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"In body repair, adhesive refers to using bonding compounds instead of (or alongside) traditional metal joining methods like welding. Adhesive-based repairs can be controversial if they don’t match the OEM’s specified procedure for strength, durability, and crash behavior.","simplifiedExplanation":"Adhesive is glue-like bonding material used to attach parts. If a shop uses adhesive when the car maker expects a different method, it can affect how safe the repair is."}},{"startTime":775.2,"endTime":790.3,"type":"term","title":"spot welding","url":"/glossary/spot-welding","quote":"Maybe even better than the OE recommended procedure of spot welding, but that's not what they did. They adhered it.","canonicalId":"term:spot-welding","priority":0.6,"confidence":0.8,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Spot welding is a type of metal-joining process where two panels are fused at small points using heat and pressure. Many body repairs specify spot welding because it provides predictable structural strength and crash performance compared with other attachment methods.","simplifiedExplanation":"Spot welding is a way to join two metal parts by fusing them at small spots. Some repairs require it because it’s the method that best matches the car’s original structure."}},{"startTime":782.2,"endTime":803.5,"type":"concept","title":"OE procedure","url":"/glossary/oe-procedure","quote":"The collision shop was sued and lost because they didn't follow OE procedure, published OE procedure.","canonicalId":"concept:oe-procedure","priority":0.7,"confidence":0.85,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"OE procedure means the original equipment manufacturer’s (OEM’s) specified repair method. In collision repair, following OE procedure matters because it’s tied to how the vehicle is engineered for strength, crash performance, and how systems are expected to be installed.","simplifiedExplanation":"OE procedure is the repair method the car maker says to use. Collision shops that skip it may end up with a repair that doesn’t perform as designed in a crash."}},{"startTime":986.1,"endTime":992.1,"type":"term","title":"TPMS systems","url":"/glossary/tpms-systems","quote":"Whether diagnosing complex drivability concerns, servicing TPMS systems, validating repairs, or working with ADOS and advanced safety technologies, Autel tools are engineered to support accurate, efficient repairs, and strict accordance with OEM procedures and standards.","canonicalId":"term:tpms-systems","priority":0.25,"confidence":0.8,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"TPMS (Tire Pressure Monitoring System) alerts the driver when a tire’s pressure is low or otherwise out of spec. Shops often need diagnostic tools to verify sensor status, relearn procedures, and correct readings after tire service.","simplifiedExplanation":"TPMS is the system that monitors tire pressure and warns you if a tire is low. After tire work, technicians may need tools to confirm the sensors are working and reporting correctly."}},{"startTime":992.1,"endTime":997.6,"type":"term","title":"OEM procedures and standards","url":"/glossary/oem-procedures-and-standards","quote":"Autel tools are engineered to support accurate, efficient repairs, and strict accordance with OEM procedures and standards. To learn more about Autel and their diagnostic solutions, visit Autel.com","canonicalId":"term:oem-procedures-and-standards","priority":0.2,"confidence":0.7,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"OEM stands for Original Equipment Manufacturer—meaning the automaker that built the vehicle. OEM procedures and standards are the specific repair steps and tolerances the manufacturer specifies, which helps ensure repairs are done the way the vehicle was designed to be serviced.","simplifiedExplanation":"OEM means the carmaker. Following OEM procedures means doing repairs the exact way the manufacturer says, so the fix matches the vehicle’s design and safety requirements."}},{"startTime":1048.1,"endTime":1155.1,"type":"term","title":"torque sticks","url":"/glossary/torque-sticks","quote":"Maybe a better one would be torque sticks. Maybe when you first start your shop or a new manager comes in and you're not allowed to use your torque sticks anymore. Every vehicle has the wheels torqued to spec using a torque wrench.","canonicalId":"term:torque-sticks","priority":0.55,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Torque sticks are preset torque tools used to tighten wheel lug nuts to a target value without needing a full torque-wrench setup each time. They’re typically designed to “click” or otherwise indicate when the preset torque is reached, helping shops standardize wheel-fastener tightening.","simplifiedExplanation":"Torque sticks are tools that tighten wheel bolts to a set tightness. Instead of measuring every time with a torque wrench, they help workers hit the same target torque more consistently."}},{"startTime":1086.5,"endTime":1143.6,"type":"term","title":"retorque","url":"/glossary/retorque","quote":"For a retorque, for you to charge, somebody will drop everything to go retorque those wheels ASAP. And that's how things are done for years. And then, I don't know, somebody comes in, they're using their torque sticks, or they're skipping the retorques.","canonicalId":"term:retorque","priority":0.5,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Retorque is the practice of re-checking and re-tightening wheel lug nuts after an initial service interval (often days to a week). The goal is to correct any settling or relaxation so the fasteners remain at the specified torque.","simplifiedExplanation":"Retorque means you re-check the wheel bolts after some time has passed. It helps make sure they’re still tight to the correct spec after the car has been driven a bit."}},{"startTime":1173.6,"endTime":1217.2,"type":"term","title":"impact","url":"/glossary/impact","quote":"Somebody buys a new impact, the old one maxed out at... 300 foot pounds... And now they got the new... electric, air, or pneumatic... that thing's got like 700 or more.","canonicalId":"term:impact","priority":0.6,"confidence":0.75,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"In this context, an impact is an impact wrench (often pneumatic or electric) used to tighten lug nuts quickly. Impact wrenches can deliver much higher torque than a torque-limiting tool, so if the shop’s procedure doesn’t account for that, it can lead to over-torquing or inconsistent tightening.","simplifiedExplanation":"Here, “impact” means an impact wrench—an air/electric tool that tightens bolts fast. If it’s too strong for the job or used incorrectly, it can tighten lug nuts too much or not consistently."}},{"startTime":1222.6,"endTime":1234.2,"type":"term","title":"torque wrench","url":"/glossary/torque-wrench","quote":"The torque wrench won't have made that mistake. It really couldn't have unless it was left out of calibration for a long time and it was way out of calibration.","canonicalId":"term:torque-wrench","priority":0.7,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"A torque wrench is a calibrated tool that tightens fasteners to a specific torque value. The speaker contrasts it with torque sticks/impacts, arguing that a torque wrench would not make the same mistake unless it was left out of calibration for a long time.","simplifiedExplanation":"A torque wrench is a tool that tightens bolts to a measured “tightness” setting. It’s designed to prevent over-tightening or under-tightening—unless the tool itself is no longer accurate."}},{"startTime":1244.0,"endTime":1259.1,"type":"term","title":"lug nut","url":"/glossary/lug-nut","quote":"And the over torquing maybe breaks lug nut or I should say lug studs or under torques. And after a while, they kind of go loose and we don't do the re torques anymore.","canonicalId":"term:lug-nut","priority":0.65,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"A lug nut is the fastener that clamps a wheel to the hub. The speaker notes that over-torquing can damage studs and under-torquing can allow fasteners to loosen over time, both of which can create serious safety risks.","simplifiedExplanation":"A lug nut is the bolt that holds your wheel onto the car. If it’s tightened too much or too little, it can lead to wheel problems—like loosening over time."}},{"startTime":1248.8,"endTime":1259.1,"type":"term","title":"lug studs","url":"/glossary/lug-studs","quote":"And the over torquing maybe breaks lug nut or I should say lug studs or under torques.","canonicalId":"term:lug-studs","priority":0.65,"confidence":0.85,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Lug studs are the threaded posts on the hub that lug nuts screw onto. The segment explains that over-torquing can damage lug studs, while under-torquing can let lug nuts loosen, both of which can lead to dangerous wheel retention issues.","simplifiedExplanation":"Lug studs are the threaded “posts” the wheel’s lug nuts tighten onto. If they’re damaged or if the lug nuts aren’t tight enough, the wheel can become unsafe."}},{"startTime":1270.7,"endTime":1285.0,"type":"term","title":"SOP (standard operating procedure)","url":"/glossary/sop-standard-operating-procedure","quote":"Somebody set up an SOP shop operating procedure or standard operating procedure that had the best of intentions...","canonicalId":"term:sop-standard-operating-procedure","priority":0.55,"confidence":0.85,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"An SOP (standard operating procedure) is a documented, repeatable set of steps a shop follows to perform work consistently. The segment argues that even well-intentioned SOPs can drift if tolerances expand over time and deviations aren’t caught.","simplifiedExplanation":"An SOP is a written checklist of how a shop is supposed to do a task. The point is that if people stop following it closely, the process can slowly get less safe."}},{"startTime":1297.4,"endTime":1304.8,"type":"term","title":"tolerances","url":"/glossary/tolerances","quote":"because nothing bad happened as that veered off... outside of certain tolerances, the tolerances over time start to expand, expand, expand very, very slowly.","canonicalId":"term:tolerances","priority":0.5,"confidence":0.8,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Tolerances are the acceptable ranges for measurements and outcomes—like how close a torque tool’s output must be to the target spec. The speaker describes tolerances effectively “expanding” over time as standards drift, increasing the chance of under- or over-tightening.","simplifiedExplanation":"Tolerances are the allowed “margin of error.” If the shop’s process drifts and the error grows, bolts and parts can end up not tightened correctly."}},{"startTime":1392.7,"endTime":1412.6,"type":"term","title":"tolerance of acceptability","url":"/glossary/tolerance-of-acceptability","quote":"And over time, ah, we started to look the other way on 10%, 20%. And now it's, you know, 150%. And it's within spec, our tolerance of acceptability...","canonicalId":"term:tolerance-of-acceptability","priority":0.45,"confidence":0.78,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"A tolerance of acceptability is the allowed range around a specification where work is considered “good enough.” When that tolerance expands (e.g., tightening beyond spec but still calling it acceptable), it increases the chance of inconsistent clamping, fitment, or component stress."}}],"speakers":[{"id":"s1","name":"Matt Fanslow","role":"host"}],"transcripts":[{"url":"http://getcarcurious.com/episodes/normalization-of-deviance-the-challenger-disaster-and-how-shop-standards-drift-e236/transcript.vtt","type":"text/vtt"}]}