OPS.14:8 - Common Anti-Patterns and How to Avoid Them

Misuse	Working repair
Recommend an option because its own net cash is positive.	Calculate the same result for the actual alternatives over a common horizon.
Call reduced allocated cost an avoidable payment.	Recover what payment changes, when it changes and why.
Rank indivisible jobs only by contribution per hour.	Compare feasible whole-job combinations or obtain the needed scheduling result.
Subtract displaced contribution twice.	Trace whether the lost receipts and avoided costs already appear in the comparison.
Use an eventual receipt to justify an unfunded advance payment.	Identify the amount and authority required before work starts.
Treat a receipt outside the horizon as permanently lost.	Show its expected date and test a horizon adequate to the receiving decision.