Lead Time Per Unit

The lead time per unit is the sum of the run times, as defined by the prime load codes for the work centers, factored by the routing time basis and converted to the lead time per unit. The lead time per unit sets valid start dates for orders planned in other-than-normal planned order quantity. When you run the Leadtime Rollup program, the system measures the lead time per unit in hours.

The system uses this formula to calculate the lead time per unit:

∑ { ((M or (L x Crew Size))/(E or M)) / ((EF or UT)x(CUM Yield)) } / TIMB1 TIMB2

The system reads the time basis code 1 (TIMB1) from the Item Branch File table (F4102) and the time basis code 2 (TIMB2) from the Routing Master File table (F3003).

If the processing option to override the number of employees or machines in the work center is set to one, the system uses this formula:

∑ { ((M or (L x Crew Size))/(1)) / ((EF or UT)x(CUM Yield)) } / TIMB1 TIMB

This table defines the values used in the formulas:

Value	Description
M or L	Machine or labor hours based on the prime load code
Crew Size	Size of the crew set in the routing (P3003)
SUM	Sum of all operations
TIMB1	Time basis code from the Item Branch File table
TIMB2	Time basis code from the routing
E or M	Number of employees or machines in the work center
EF or UT	Efficiency or utilization from the work center
CUM Yield %	Yield from the routing