The Failure Pattern Library
Delivery systems fail in patterns. We named them.
TAD’s diagnostic engine pattern-matches your delivery system against 9 structural failure modes — refined from years of firsthand diagnosis across dozens of engineering organizations. Your dashboard displays these patterns as noise. TAD diagnoses them by name, with the detection signature to prove it.
The Named Four
The AI Productivity Paradox
Flow Efficiency · Throughput & Predictability
Your teams adopted AI tooling. Individual stages got measurably faster. End-to-end delivery didn’t move. The gains were absorbed at your system’s constraint — speeding one role didn’t accelerate delivery, it relocated the bottleneck downstream and hid it there.
Detection signature
Stage-level cycle time compressing while end-to-end cycle time and throughput stay flat — divergence sustained four weeks or longer.
“Dev-stage cycle time improved 31% after AI tooling rollout. End-to-end cycle time improved 2%. The gains are queuing at code review and release verification. You didn’t buy speed — you bought a bigger pile at the constraint.”
The WIP Masquerade
WIP Discipline · Team Structure & Ownership
Overload that has lasted long enough starts reading as normal load. Teams describe a capacity problem and ask for headcount. The data says something else: everything is in progress, nothing is finishing, and the “capacity problem” is WIP wearing a disguise.
Detection signature
WIP-per-person persistently above threshold, aging-WIP distribution skewing older — while self-reported pain says “we’re understaffed.”
“Your team of 7 is carrying 41 in-flight items. Median item age is 24 days and climbing. This is not a capacity problem. Adding headcount would add WIP, not throughput.”
Intake Displacement
Work Intake Quality · Flow Efficiency
The bottleneck is at the front door, but it gets blamed one stage downstream. Poorly scoped work enters the system, generates rework cycles mid-flow, and the org concludes it has a prioritization problem. It doesn’t. It has an intake problem that prioritization keeps taking the blame for.
Detection signature
Elevated rework and reopen rates, items entering sprints without readiness signals — while declared pain points name “prioritization.”
“Team B’s throughput declined 34% this quarter. The root cause is not Team B — it’s Team A’s intake process, sending poorly scoped work downstream and forcing rework cycles that inflate cycle time by 40%.”
Gate Drift
Delivery Visibility & Metrics · SLE Integrity
Every process gate degrades in one of two directions. It becomes a delay mechanism — dwell time inflating while nothing gets rejected. Or it becomes a rubber stamp — near-instant transit, 100% pass-through, protecting nothing. Both directions mean the gate has stopped protecting signal. TAD tracks both.
Detection signature
Gate-stage dwell trending up with a flat rejection rate (delay mode), or gate transit collapsing toward zero with full pass-through (rubber-stamp mode).
“Your ‘Ready for Review’ gate averages 4.2 days of dwell with a 1% rejection rate. It isn’t reviewing anything. It’s a queue with a title.”
The Gated Five
Five additional patterns are detected in Plus and Pro diagnostics. Their detection methodology stays gated — some signals stop working once they can be gamed.
🔒 Plus & Pro
The Phantom SLE
Your SLE exists as an artifact, not an instrument. Teams are measured against a prediction with no statistical basis.
🔒 Plus & Pro
The Accidental Constraint
Nobody chose where your bottleneck sits. It was discovered, not designed — and it moves every quarter.
🔒 Plus & Pro
Velocity Theater
Cadence metrics are steering real decisions while flow metrics go unread.
🔒 Plus & Pro
The Relocated Bottleneck
A recent local optimization moved your constraint downstream. The improvement is real. The delivery gain isn’t.
🔒 Plus & Pro
The Redaction Signal
What your org won’t share is itself diagnostic. Methodology undisclosed — by design.
Which patterns are running in your system right now?
Every delivery system carries at least one. The free diagnostic gives you a directional read in under 10 minutes. Plus and Pro name the patterns, show the evidence, and sequence the fix.