{"id":123698,"date":"2026-08-02T14:06:18","date_gmt":"2026-08-02T14:06:18","guid":{"rendered":"https:\/\/teeptrak.com\/?p=123698"},"modified":"2026-08-02T16:07:18","modified_gmt":"2026-08-02T16:07:18","slug":"downtime-reason-codes","status":"publish","type":"post","link":"https:\/\/teeptrak.com\/en\/downtime-reason-codes\/","title":{"rendered":"Downtime Reason Codes: The Standard List & How to Use Them"},"content":{"rendered":"

Downtime reason codes<\/strong> are a standardized set of short labels that describe why<\/em> a machine stopped \u2014 for example BRK<\/code> for a breakdown or SET<\/code> for a changeover. They turn raw stoppage time into structured data you can analyze, so you can see which causes actually drive your losses instead of guessing. This guide gives you a ready-to-use reason-code list, shows how to map each code to OEE and the Six Big Losses, and explains how to roll codes out on the shop floor. To start tracking today, use our OEE calculator<\/a> and the free downtime template linked below.<\/p>\n

What are manufacturing downtime reason codes?<\/h2>\n

A downtime reason code is a controlled category assigned to every production stoppage. Instead of an operator writing a free-text note like “machine broke,” they select a fixed code (and optionally a sub-reason). Because every stop is classified the same way, the data can be summed, ranked and compared across shifts, machines and plants. Reason codes are the difference between knowing you lost 8 hours last week and knowing that 5 of those hours were changeovers on Line 2.<\/p>\n

The standard downtime reason-code list<\/h2>\n

The list below is a proven starting point used across 450+ TeepTrak deployments. Keep the number of top-level codes small (15\u201320) so operators can select the right one in seconds; add sub-reasons only where they change the action you would take.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Code<\/th>\nReason<\/th>\nOEE factor<\/th>\nSix Big Loss<\/th>\nCounts as a loss?<\/th>\n<\/tr>\n<\/thead>\n
BRK<\/td>\nBreakdown \/ equipment failure<\/td>\nAvailability<\/td>\n1. Breakdowns<\/td>\nYes<\/td>\n<\/tr>\n
SET<\/td>\nSetup \/ changeover<\/td>\nAvailability<\/td>\n2. Setup & Adjustments<\/td>\nYes<\/td>\n<\/tr>\n
ADJ<\/td>\nAdjustment \/ settings<\/td>\nAvailability<\/td>\n2. Setup & Adjustments<\/td>\nYes<\/td>\n<\/tr>\n
TOOL<\/td>\nTooling change or failure<\/td>\nAvailability<\/td>\n2. Setup & Adjustments<\/td>\nYes<\/td>\n<\/tr>\n
NOM<\/td>\nNo material \/ starvation<\/td>\nAvailability<\/td>\n1. Breakdowns<\/td>\nYes<\/td>\n<\/tr>\n
NOP<\/td>\nNo operator \/ no labour<\/td>\nAvailability<\/td>\n1. Breakdowns<\/td>\nYes<\/td>\n<\/tr>\n
BLK<\/td>\nBlocked \/ downstream full<\/td>\nAvailability<\/td>\n1. Breakdowns<\/td>\nYes<\/td>\n<\/tr>\n
MIN<\/td>\nMinor stop \/ jam \/ misfeed<\/td>\nPerformance<\/td>\n3. Idling & Minor Stops<\/td>\nYes<\/td>\n<\/tr>\n
CLN<\/td>\nIn-process cleaning<\/td>\nPerformance<\/td>\n3. Idling & Minor Stops<\/td>\nYes<\/td>\n<\/tr>\n
SPD<\/td>\nReduced speed \/ slow cycle<\/td>\nPerformance<\/td>\n4. Reduced Speed<\/td>\nYes<\/td>\n<\/tr>\n
QDF<\/td>\nQuality defect \/ scrap<\/td>\nQuality<\/td>\n5. Process Defects<\/td>\nYes<\/td>\n<\/tr>\n
REW<\/td>\nRework<\/td>\nQuality<\/td>\n5. Process Defects<\/td>\nYes<\/td>\n<\/tr>\n
STU<\/td>\nStartup reject \/ warm-up scrap<\/td>\nQuality<\/td>\n6. Startup Rejects<\/td>\nYes<\/td>\n<\/tr>\n
PM<\/td>\nPlanned maintenance<\/td>\nPlanned<\/td>\nn\/a<\/td>\nNo (excluded)<\/td>\n<\/tr>\n
BRK-PL<\/td>\nPlanned break \/ lunch<\/td>\nPlanned<\/td>\nn\/a<\/td>\nNo (excluded)<\/td>\n<\/tr>\n
MTG<\/td>\nMeeting \/ training<\/td>\nPlanned<\/td>\nn\/a<\/td>\nNo (excluded)<\/td>\n<\/tr>\n
NOD<\/td>\nNo demand \/ not scheduled<\/td>\nPlanned<\/td>\nn\/a<\/td>\nNo (excluded)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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Get the free Downtime Tracking Sheet (Excel)<\/h3>\n

Log every stop by reason code with standardized codes and an automatic Pareto of your biggest losses.<\/p>\n \n

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