Calculating man/machine hours

The man hours and machine hours that are required to carry out an operation are calculated from the data in the Routing module.

The most important factors are:

These factors are defined in the following sessions:

  • Tasks (Reference Operations) (tirou0103m000)
  • Routing Operations (tirou1102m000)
  • Task Relationships (tirou0104m000)
  • Production Planning (tisfc0110m000)

Man hours

The number of man hours that are required to carry out an operation are calculated as follows:

man hours =
(setup time * man occupation for setup) + input quantity of operation *
cycle time/routing unit * man occupation for production

If the operation has a fixed duration, then the man hours are independent of the batch size. The man hours are then calculated as follows:

man hours =
(setup time * man occupation for setup) + cycle time/routing unit *
man occupation for production

A fixed duration can be defined in the following sessions:

  • Routing Operations (tirou1102m000)
  • Tasks (Reference Operations) (tirou0103m000)
  • Generic Routing (tipcf3120m000) (for operations in a generic routing).
  • Task Relationships (tirou0104m000)
  • Production Planning (tisfc0110m000)

Machine hours

The number of machine hours that are required to carry out an operation are calculated as follows:

machine hours =
(setup time + input quantity of operation * cycle time/routing unit) *
machine occupation

If the operation has a fixed duration, then the machine hours are independent of the input quantity of the operation and the routing unit. The machine hours are then calculated as follows:

machine hours =
(setup time + cycle time/routing unit) * machine occupation

A fixed duration can be defined in the following sessions:

  • Routing Operations (tirou1102m000)
  • Tasks (Reference Operations) (tirou0103m000)
  • Generic Routing (tipcf3120m000) (for operations in a generic routing).
  • Task Relationships (tirou0104m000)
  • Production Planning (tisfc0110m000)