Typy problémů můžeme rozdělit dle evidencí, kterých se týkají:
| Evidence | Název | Význam |
|---|---|---|
| Výrobní požadavek | Nenaplánováno | Nedošlo k vytvoření plánu za účelem splnění výrobního požadavku. |
| Přebytek | A demand is planned for more than the requested quantity. | |
| Nedostatek | A demand is planned for less than the requested quantity. | |
| Zpoždění | A demand is satisfied later than the accepted tolerance after its due date. | |
| Předstih | A demand is planned earlier than the accepted tolerance before its due date. | |
| Neplatná data | Some data problem prevents this object from being planned. | |
| Zdroj | Přetížení | A resource is being overloaded during a certain period of time. |
| Nezatížení | A resource is loaded below its minimum during a certain period of time. | |
| Zásobník | Přebytek materiálu | A buffer is carrying too much material during a certain period of time. |
| Nedostatek materiálu | A buffer is having a material shortage during a certain period of time. | |
| Neplatná data | Flagged when a buffer has no ways of replenishment or too many. | |
| Operace | Minulost | Flagged when an operation is being planned in the past. For operations in the status approved or proposed, the start date is before the current date of the plan. For operations in the status confirmed, the end date is before the current date of the plan (ie they are overdue and should have been finished already). |
| Před odsazením plánu | Flagged when an operation in the status approved or proposed is being planned before its fence date, i.e. it starts 1) after the current date of the plan, 2) it starts before the current date of the plan plus the release fence of the operation, and 3) the status is approved or proposed. | |
| Přednost | Flagged when the sequence of two operations within a routing isn’t respected. |