C.39.RO:8 - Common Anti-Patterns and How to Avoid Them

Anti-pattern	Consequence	Repair
Copy the successful constants	A later input receives the earlier case’s answer.	Recover the relation that selected those constants and apply it to the changed input.
Turn every fixed fact into a parameter	A premise needed by the operation disappears.	State the proposed variation and retain or replace the conditions that support it.
Hide a missing operation behind a name	The next practitioner can request a result but cannot obtain it.	Recover or construct the step that supplies that result.
Compose matching labels	An output reaches a step that needs a different quantity or condition.	Compare the intermediate meanings and application conditions.
Extend a physical action from one successful run	A change of apparatus or operating condition defeats the claimed repeatability.	Carry the physical basis and develop the missing relation for the changed use.
Discard a failure witness	The practitioner repeats a search that the result already rules out.	Use the obstruction to change the attainable result, permitted operation or next question.