While conducting design of experiment procedure, we determine influential factors which affect output, vary determined variables to get a required output value.

The DFSS activities are said to be Design for Six-sigma activities. The process of design of experiments is very useful in se activities.

SPC is a passive statistical method as, in this procedure; we have to wait for process information to come, to decide a step to control process. However, if process is in-control, we can?t do very much to reduce variability.

The experimental design methods may be used eir in process development or process troubleshooting to improve process performance, or to obtain a process that is robust or insensitive to external variability causes.

The use of design of experiments procedure is quite useful in process development. This gives an improved yield, reduced variability and closer conformance to nominal, and reduced development time.

There are two types of factors present with a process input while running period of a process, controllable, and uncontrollable input factors. The factors, which can be changed according to user?s wish, are called uncontrollable factors.

The Design of experiment procedure helps in engineering design by helping in evaluation of material alternatives, key product design parameters, and basic design configurations.

The design of experiment procedure is, determining variables which most affect process state and output. We vary se variables to get a relationship between m and output.

The general model of process describes a process to which input is provided in presence of controllable factors and uncontrollable input factors, to get an output.

The design of experiments can also play a major role in engineering design activities, where new products are developed and existing ones are improved. So this is also used in DFSS activities.