OPS.11.1:2 - Problem

Descriptions at different scopes can each look reasonable while making incompatible assumptions about the same operation. A resource appears once in each departmental plan and is then treated as two resources. An internal exit becomes the completion event of an external service, although acceptance still takes time. Several samples are aggregated to one order without retaining which sample prevents delivery.

Adding detail everywhere makes the account harder to build, interpret and maintain. Keeping only totals can erase the dependence that matters. The practitioner needs a way to find and retain that dependence while leaving irrelevant detail out.