Describing the problem according to a standard methodology is a helpful heuristic in the early stages of diagnosis. When you collect information to describe the problem, think of yourself as a reporter who will have to describe the problem to people who have no opportunity to observe the situation directly.
Table 8.1 shows a standard approach to describing a situation or problem. The focus is on those things that occurred, existed, or were observed versus those things that did not occur, did not exist, or weren’t observed.
| Is | Is Not | |
|---|---|---|
| What (identity) | ||
| When (timing) | ||
| Where (location) | ||
| How much, how many (extent) | 
Table 8.2 shows another standard approach to describing a situation or problem. The focus here is on the difference between the normal or expected situation and what actually happened.
| Difference/Change | Effect | |
|---|---|---|
| What (conditions, activities, components) | ||
| When (status, schedule, process) | ||
| Where (physical location) | ||
| How (omitted, extra, or out-of-sequence action) | ||
| Who (actors, observers, supervisors) | 
