In most production processes there are a few dominant variables which have a greater potential to cause irreparable damage to the product, ie. These dominant variables if allowed to get established will essentially dominate the production system and drown out any other variable. Production Control Production control can be defined as maintaining a defined level of quality, ie. In any production system it is important to have control systems which ensure that the quality levels are maintained and that any change which occurs are within the acceptable limits. If the production floor is not organized in such a fashion that the basic production system specifications are not maintained the overall management objectives certainly never would be.
All processes are subject to two types of variation, natural variation and chronic variation.
Natural variation occurs due to natural random activity and this type of change does not follow any set pattern. Chronic variation is due to an underlying cause and can cause economic loss if allowed get out of control. Having a good working knowledge of the process means that the two types of variation can be identified and the correct action taken when they do. Planning the control system. As the objective is to maintain the accepted standard level of performance for the vital process characteristics, there needs to be a standard which is judged as being the standard level of performance for that process characteristic.