Process conditions are given below: USL = 32, LSL = 29, Target = 30.5, Process Mean = 31.8. A Black Belt’s comment on such a process after all investigating all pre conditions is

OPTIONS

• The process is stable
• The process seems to be capable on specification
• The process is capable on target
• The process could be unstable, and the degree of confidence on future stability is low

ANSWER

The process could be unstable, and the degree of confidence on future stability is low

EXPLANATION

The process mean within the USL states process stability although Control limits may still be less, it could be fair in saying the process could be unstable, and the degree of confidence on future stability is low.