ME.25:4.1 - Choose the working change and what must survive it

Take the difficulty and requirements from the receiving work. State the gain sought and the properties that the change must retain. For example, the recipient may need the same acceptance decision with less effort, a result before a deadline, or a new result the incumbent cannot produce. These are different transformation questions.

Retain requirements about intermediate contributions when they matter. An early indication, an independent assessment or an explanation of every failure can be part of the needed result. Equality of a final number does not include them automatically.

Recover the allowed variation. The method may permit a different order or performer while requiring an independent second observation. A proposed change of that requirement is a separate decision under ME.3; omitting it from the model does not amend it.