This participant is using the product solely because it fulfills a need or goal. They may not be a programmer. They may be uninterested or incapable of locating code responsible for defective behavior. May be a strong advocate, promoting the product, helping new users, etc. Observations on effective size and power Activities are completed in the time dictated by the task, methods used, and the effective power.
Improved methods can compensate for lower effective power.
If the required effective size for an activity is not realized, then that activity will not be completed, regardless of effective power or size for other activities. Because there is often an implicit deadline for completion, some activities can require a minimum effective power in addition to minimum effective size. Some activities are sequential. In order for a series of activities to be completed, the effective size must be realized and the effective power at each step must be large enough to complete the task in the required time. Attempting an activity which will fail is a waste of resources.