level: Production Performance Metrics
Questions and Answers List
level questions: Production Performance Metrics
| Question | Answer |
|---|---|
| T_c | Cycle time |
| R_p | Production rate - units produced per unit time (typically hour) |
| A | Availability - function of MTBF and MTTR (%) |
| MTBF | Mean time between failure |
| MTTR | Mean time to repair |
| PC | Production capacity - maximum output per unit time (typically week) |
| U | Utilisation - amount of productivity output (Q) relative to production capacity (%) |
| MLT | Manufacturing lead time - time from order to delivery |
| WIP | Work-in-progress - quantity of parts currently in the workshop (inventory) |
| Cycle time eq | T_c = T_o + T_h + T_th Cycle = operation processing + handling (placing product in machine) + tool handling (changing tools in between) |
| Batch production eq | Q = Q |
| Job shop production eq | Q = 1 |
| High quantity production eq | Q = infinity |