Define TQM, Lean, and JIT. How does Lean operations and JIT also
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Answer all 5 Questions.
1. Define TQM, Lean, and JIT. How does Lean operations and JIT also helps in improving
process quality?
2. The sales data for Victoria Gifts is given:
Period A A t t
1 149
2 134
3 131
4 147
5 163
6 109
7 189
8 191
9 162
a. Using weights of 0.2, 0.3, and 0.5, forecast the demand for period 4 through 10.
b. With Alpha = 0.1, and initial forecast of 149, forecast through period 10 using simple
exponential smoothing.
3. Demand for a newly introduced toy is as following:
Period A A t t
1 557
2 546
3 566
4 562
5 582
6 566
7 565
8 579
9 589
10 608
11 580
12 603
Using trend projection (simple regression), forecast for period 13 through 15. Using the
trend projection equation, forecast for period 1 through 12, and calculate MAD.
Based on your analysis of MAD, what conclusion would you draw for forecasts 13 through
15?
4. Based on the following information, calculate CL, UCL, and LCL for a p-bar chart using 3
sigma control. Plot your control chart, and based on the control chart, suggest what action
needs to be taken?
Sample
n = Sample
Size
Number of
Defectives
1 200 96
2 200 120
3 200 108
4 200 144
5 200 96
6 200 108
7 200 144
8 200 108
9 200 132
10 200 120
11 200 84
12 200 132
13 200 96
14 200 96
15 200 72
5. Northcutt Bikes purchases two types of wheels for their roadracing bikes: a regular
version and a deluxe version. The table below has demand information for the past year
for each style of wheel, as well as combined figures.
REGULAR DELUXE Combined
Month Wheels Wheels Demand
January 208 481 689 1849.884 1070.467
February 153 316 469 1361.158 703.2119
March 238 553 791 2122.129 1230.538
April 296 648 944 2638.237 1441.763
May 292 228 520 2599.175 507.9288
June 322 527 849 2866.567 1173.325
July 102 605 707 908.2062 1344.477
August 211 510 721 1882.909 1133.85
September 286 538 824 2547.511 1195.676
October 163 590 753 1456.65
November 186 657 843 1654.898 1462.026
December 129 582 711 1154.784 1295.332
Std. Dev.,
Monthly
Demand 72.1 122.8 129.2
Other important information:
Yearly holding cost 20% of item cost
Ordering cost $200 per order
Service level 95%
Leadtime 0.5 months
Item costs
Deluxe Wheels $40 each
Regular Wheels $35 each
aalate e EOQ
b. Calculate the ROP for each wheel type.
c. For each wheel type, calculate the total yearly holding and ordering cost, as well as total
item cost.
11 years ago
Answer for: Define TQM, Lean, and JIT. How does Lean operations and JIT also
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