Resource requirements planning
26.2
The number of presses is calculated from the quotient of the required occupancy time T bB divided by the possible scheduled occupancy time T pB. It should be noted here that the equipment cannot be used for more than 3 shifts. 1 ≤ nS ≤ 379
Eqn. 1
Eqn. 2
Eqn. 3
Eqn. 4
| Number of presses required | nB | = | Stck. | ||
| Required occupancy time | TbB | = | min. p.a. | ||
| Possible occupancy time | TpB | = | min. p. a. | ||
| Capacity reserve | nres | = | Tsd. Stck. p. a. |
| Output performance | nA | = | Tsd. Stck / a. | |||
| Lot size | L | = | Tsd. Stck. | |||
| Set-up time | trB | = | min. /Job | |||
| Volume performance | M | = | Stk/min | |||
| Number d. layers | nS | = | Stck. | |||
| Total Efficiency | NG | = | % | |||
| Number of working days / a. | nAT | = | p. a. | |||
| Working Hours / Shift | AZ | = | min. / Schicht |
Calc 1
press needs
The quantity output M of a press is also referred to as the production rate or throughput capacity.
In flow production or large series production, the lot size corresponds to the tool life.
The economic lot size can also be used as the lot size.
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Feiler, M. / Lehrunterlage Arbeitsvorbereitung / … / Göppingen / 1995 / …