Learning WITNESS Bi
Setups Machines in WITNESS can have setups in addition to breakdowns. These are planned interruptions to the machine cycling to replace tooling, or for recalibration, etc. Machines can have multiple setups. Setups can be defined to take place whenever a part type changes (e.g. a new batch enters production), after a set number of operations (e.g. a tool wearing out), or a value change. This last option is very flexible as simply changing a variable value in an actions statement will cause the machine to need a setup to continue.
In this example the first setup will take place every 1500 operations and will take 20 time units. The second one will be undertaken every time the part being processed changes taking 5 time units. There are many other options including Labor rules to undertake the setup, options to setup when no part is present (or not!) and points to add actions statements. Note that the option above does not include distributions but the numeric fields here can all accept distributions, variables, even functions to allow the most complex of logic to be enabled
LEARNING WITNESS BOOK ONE
BREAKDOWNS AND SETUPS
Page 96