Preventing rather than catching.
WHY PREVENTION BEATS INSPECTION
Inspection finds defects after the cost of making them.
WHAT INSPECTION STILL PROVIDES
A last line before the customer.
WHAT TO AIM FOR
Fewer defects reaching inspection over time.
WHAT BUILDING IT IN LOOKS LIKE
Clear standards before work starts Checks by the person doing the work Problems stopped at the point they occur Errors made difficult by design
WHY SELF-CHECKING MATTERS
It catches problems immediately, when correction is cheapest.
WHAT TO PROVIDE
A clear definition of what good looks like.
HOW
Examples, rather than descriptions.
WHY EXAMPLES
They are unambiguous.
WHAT TO ESTABLISH ABOUT STOPPING
That anyone may stop work when something is wrong.
WHY THAT AUTHORITY MATTERS
Continuing produces more defective work.
WHAT TO AVOID
Pressure to continue despite known problems Rewarding volume over correctness
WHY
It reliably produces defects.
WHAT TO DO AT HANDOVERS
Define what the receiving person should check.
WHY HANDOVERS SPECIFICALLY
They are where most defects originate and where responsibility blurs.
WHAT TO DOCUMENT
The check, and who does it.
WHAT TO MEASURE
Where defects are found.
WHAT FINDING THEM LATE INDICATES
Checks too far from where the work happens.
