Op Man Final Review Problems

# 5perc entwhic his twos tandarddev iations

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ned ques tionnaires from the 1,200 meals eac h day . The res ults are as follows : Dec ember 1 Dec ember 2 Dec ember 3 Dec ember 4 Dec ember 5 Dec ember 6 Dec ember 7 Dec ember 8 Dec ember 9 Dec ember 10 NUMBER OF UNSATISFACTORY SAMPLE MEALS S I ZE 74 1,000 42 1,000 64 1,000 80 1,000 40 1,000 50 1,000 65 1,000 70 1,000 40 1,000 75 1,000 600 10,000 a. Determine the , Sp, UCL and LCL bas ed on the ques tionnaire res ults , us ing a c onfidenc e interv al of 95.5 perc ent, whic h is two s tandard dev iations . (Round your answers to 4 decim al places.) Sp UCL LCL 0.0600 0.0075 0.0750 0.0450 b. What c omments c an y ou mak e about the proc es s ? The process is out of statistical control. Worksheet Problem 13­10 Learning Objective: 13­02 Analyze process quality using statistics. Problem 13-10 You are the newly appointed as s is tant adminis trator at a loc al hos pital, and y our firs t projec t is to inv es tigate the quality of the patient meals put out by the food­s erv ic e department. You c onduc ted a 10­ day s urv ey by s ubmitting a s imple ques tionnaire to the 400 patients with eac h meal, as k ing that they s imply c hec k off that the meal was either s atis fac tory or uns atis fac tory . For s implic ity in this problem, as s ume that the res pons e was 1,000 returned ques tionnaires from the 1,200 meals eac h day . The res ults are as follows : Dec ember 1 Dec ember 2 Dec ember 3 Dec ember 4 Dec ember 5 Dec ember 6 Dec ember 7 Dec ember 8 Dec ember 9 Dec ember 10 NUMBER OF UNSATISFACTORY SAMPLE MEALS S I ZE 74 1,000 42 1,000 64 1,000 80 1,000 40 1,000 50 1,000 65 1,000 70 1,000 40 1,000 75 1,000 http://e z to.mhe c loud.mc gr a w- hill.c om/hm.tpx? todo= pr intvie w 18/29 1/29/2014 Assignme nt Pr int Vie w 600 10,000 a. Determine the , Sp, UCL and LCL bas ed on the ques tionnaire res ults , us ing a c onfidenc e interv al of 95.5 perc ent, whic h is two s tandard dev iations . (Round your answers to 4 decim al places.) Sp UCL LCL 0.0600 ± .005 0.0075 ± .005 0.0750 ± .005 0.0450 ± .005 b. What c omments c an y ou mak e about the proc es s ? The proc es s is out of s tatis tic al c ontrol. Explanation: a. NUMBER OF UNSATISFACTORY SAMPLE MEALS S I ZE Dec ember 1 74 1,000 Dec ember 2 42 1,000 Dec ember 3 64 1,000 Dec ember 4 80 1,000 Dec ember 5 40 1,000 Dec ember 6 50 1,000 Dec ember 7 65 1,000 Dec ember 8 70 1,000 Dec ember 9 40 1,000 Dec ember 10 75 1,000 Sum: 600 10,000 = p 0.074 0.042 0.064 0.080 0.040 0.050 0.065 0.070 0.040 0.075 600 = 0.060 10(1,000) UCL = + 2Sp = 0.060 + 2(0.0075) = 0.0750 LCL = − 2Sp = 0.060 − 2(0.0075) = 0.0450 b. The c hart indic ates that the proc es s is out of c ontrol. There are 3 s amples at or outs ide the c ontrol limits . The adminis trator s hould inv es tigate for the c aus e of the v ariation in the quality of the patient meals . http://e z to.mhe c loud.mc gr a w- hill.c om/hm.tpx? todo= pr intvie w 19/29 1/29/2014 15. Assignme nt Pr int Vie w awar d: 1.42 out of 1.42 points Problem 14-14 Meritor is s o pleas ed with the outc ome from prev ious s ugges tions that the c ons ultants are inv ited bac k for more work . The c ons ultants now s ugges t a more c omplete robotic automation of the mak ing of muffler as s emblies and als o a reduc tion in c ontainer s iz e to ten per c ontainer. Meritor implements thes e s ugges tions and the res ult is that the muffler as s embly fabric ation c ell now av erages approx imately 36 as s emblies per hour, and the c ataly tic c onv erter as s embly c ell c an now res pond to an order for a batc h of c ataly tic c onv erters in one hour. The s afety s toc k remains at 12.5 perc ent. How many k anban c ards are needed? (Round up your answer to the next whole num ber.) Number of k anban c ard s ets 5 Worksheet Learning Objective: 14­02 Illustrate how lean concepts can be applied to supply chain processes. Problem 14­14 Problem 14-14 Meritor is s o pleas ed with the outc ome from prev ious s ugges tions that the c ons ultants are inv ited bac k for more work . The c ons ultants now s ugges t a more c omplete robotic automation of the mak ing of muffler as s emblies and als o a reduc tion in c ontainer s iz e to ten per c ontainer. Meritor implements thes e s ugges tions and the res ult is that the muffler as s embly fabric ation c ell now av erages approx imately 36 as s emblies per hour, and the c ataly tic c onv erter as s embly c ell c an now res pond to an order for a batc h of c ataly tic c onv erters in one hour. The s afety s toc k remains at...
View Full Document

## This note was uploaded on 01/29/2014 for the course MAN 4504 taught by Professor Georgekyparisis during the Fall '09 term at FIU.

Ask a homework question - tutors are online