Question

Process capability is independent of

1. tooling
2. operator skill
3. condition of the machine
4. specifications of a job

Answer 1

Correct Answer - Option 4 : specifications of a job

Explanation:

Process capability:

• Process capability may be defined as the "minimum spread of a specific measurement variation which will include 99.7% of the measurements from the given process".
• In other words, process capability = 6σ' since 6σ' is taken as a measure of the spread of the process, which is also called natural tolerance.
• Process capability is carried out to measure the ability of the process to meet the specified tolerances.
• A process capability consists of:

1. Measuring the process capability to find out whether the process in inherently capable of meeting specified tolerance limits.
2. Discovering why a process capable is falling to meet specification.

• When making the study it is important to minimize the effect of factors such as unnatural material variations, process adjustment etc.
• Hence homogenous material should be used, no process adjustment should be made during the study, the trained operator should be allowed to perform the work.