Question

1. How can a process be “in control” but not delivering what the customer wants? What is "process capability”? 2. If the LCL on a process is much greater than the LSL, will the customer tend to be “happy" or "disappointed” with the the results of this process? Why? 3. A) If Cp = 1.00, what % of good product is the process expected to deliver? Answer B) Complete the following: “A common minimum standard in industry is a Cp of at least 4. In what circumstance will C, be equal to Cpk ? s. Why would a team decide to improve a process that is delivering a Cp of 1.33 or greater?

Answer 1

1) How can a process be" in control" but not delivering what the customer wants ? what is "process capability a Ang Process control is defined by the control limits UCL and Lel. These values are based on the mean or range of the observed samples on the other hand customer demands are based on Specifications provided there is use and LSL These values are not neccesarily centered on the mean of the observed samples. A process that is with in control may have sufficiently good co value. How- -ever the as the Cpk value may be below expectation .This is " Process may be coithin control but not as per the Customer Secifications. Process capability is the measurable metric of a Process where the output of the process is compared to the specification in terms of Variability. 2 if the LCL on a process in much greater than the LSL, will the customertend to be "happy" or " disappoined" with the results of this process ? why? customer will be disappoined Higher LOL than LSL means that the vendor will accept quality where the customer specifications has been breached best the control limits Ang

have are breached, not been when customer specifications customer will be unhappy disappointed the good product is the process exp- 3) A if Cp =1.00 what if of -ected to deliver? CP value actually does not provide a measure of defects per million observation COPMO). However, if the Process mean is centered with the specification mean and the Cp value is i. That will mean that the cok is also . 1) This means that there colllbe o. 27% defects in other words there coill be 99.73% good Producuts 8 minimum Standard Complete the following "A common in industry is a Cp of at least minimum A common stand and in Industry is a cp of at least 1. 4 in what circumstance will ep be equal to apka As cp cwill be equal to cpk if the mean of the Process and the specifications is the same., in other words is the process is cenlered with specification,

5) why would a team decide to improve a Process that is delivering a cp of 133 or greator? Ang High cp value denotes that the variablity in the process is within control Homever, it does not mean that the Specifications are being met. in spite of a high cp value a process may not be centered and it could mean that one of the specifications is being breached Naturaly this would require the team to improve the process by either lowering the variability or centering the process.