Please solve 1 or more question. Post your answer even for 1 solved question.

Question 1 and 2 are based on online quality assurance and 3 and 4 are offline quality assessment

21. A certain product has been statistically controlled at a process average of 36.0 and a standar deviation of 1.00. The product is presently being sold to two users who have different specificatio requirements. User A has established specifications of 38.0 + 4.0 for the product, and user B ha specifications of 36.0 4.0. Assuming that the two users' needs are equal, a suggestion is made to shit the process target to 37.0. a) At the present process set-up and proposed target value, what percent of the product will not meet the specifications of the user A and the user B? b) Do you think that this shift to a process target of 37.0 would be desirable? Explain your answer. State the assumption made. 5 marks Q2. Twenty five feet reels of wire are wound automatically from a continuous source of wire. The standard deviation for the cutting operation has been found to remain constant at 0.50 ft. Reels are Checked every hour in subgroups of size nine. The user of these reels has purchase specification of 25+ 1 feet, but he is really concerned about short reels. a) What target value should be set by the manufacturer to ensure that 99.9% of the reels meet the minimum specification? State the assumption made. by What is the probability of Type Il error for chart if the process average increases by 1% ? 5 marks Q3. A common double sampling plan is as follows: Sample No. Sample size Acceptance No. Rejection No. 1 1 2 0 1 (** indicates that rejection is not permitted on first sample) Plot oC and AOQ curves of this plan, assuming that the lot is very large in size. Also determine average outgoing quality limit (AOQL). What do you think of the quality protection given by this plan? 5 marks Q 4. Differentiate between: a) ASS Curve and ATI Curve b) Acceptance Rejection and Acceptance Rectification Plans