Supply Chain Concepts

Input Output Control

Major Topic Area: ERP/MRPII

Input/Output control is a methodology designed to measure and manage the levels of work in process (wip) in a manufacturing environment.

As the name implies, an input/output control report has two major sections. The input section represents the actual and planned wip that will be added to the existing backlog of work for a work center. This additional backlog is generated from one or more production orders that utilize this work center to produce an item. The output section is a time phased plan of the production from the work center. Planned output will consume backlog.

The following example will illustrate the report calculations.

	0	1	2	3	4
Input		10	20	40	10
Output		5	15	30	10
Baacklog	20	25	30	40	40

In general, the planned backlog in any period equals the previous backlog plus any planned input subtract any planned output. For example, in period 1, the ending backlog equals 20 (the starting backlog) plus 20 (the period 1 input) subtract 5 (period 1 output).

 

 

 

 

 

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