4.
1. ACCEPTANCE SAMPLING where we are
concerned with monitoring the quality of
manufactured items supplied by the manufacturer to
consumers in batches.
2. PROCESS CONTROL where goods are produced
continuously and the problem is to detect changes in
the performance of the manufacturing process and
take action (when necessary) to control the process.
5.
Acceptance sampling techniques can be divided into two
classes:
1. SAMPLING BY ATTRIBUTE (qualitative approach).
2. SAMPLING BY VARIABLE (quantitative approach).
The objectives of process control are:
1. To detect any changes due to assignable causes as
early as possible.
2. To allow production to continue without too many
interruptions when the process is in control.