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Quality analysis of hmc
1. Quality analysis of Machine Shop
(HMC)
Presenting:
GROUP # 01
Abu Bakar Siddique ME123009
Shahid Hussain ME123019
Muhammad Ifraheem ME123022
Fahad Akhter ME123082
2. Introduction of HMC
• Leading enterprise in a country.
• Two main Production unit
• Mechanical works
• Foundry & Forge works
• Mechanical works starts 1971
3. Machine Shop
• Most Important Shop
• Contributes major part in income of industry
• Divided in three categories
• Small Bay
• Medium Bay
• Heavy Bay
• Batch Production
14. Flow Process Chart
Processes Time ⃝ → □ D ∇
Drawing Reading 05 min √
Transfer to Turning machine 02 min √
Machine checking 02 min √
Turning 12 min √
Transfer to Grinding machine 02 min √
Tool Grinding 01 min √
Check dimensions 02 min √
Transfer to another machine for facing 03 min √
Facing 10 min √
Check dimensions 02 min √
Transfer to Grinding machine 01 min √
Tool Grinding 01 min √
Supervisor inspection 05 min √
Transfer to Milling 02 min √
Wait for completing job 14 min √
Milling 40 min √
Check dimensions 05 min √
Supervisor inspection 05 min √
Transfer to Drilling 02 min √
Drilling 10 min √
Check dimensions 02 min √
Transfer to QC Department 05 min √
Quality Inspection 07min √
Transfer to store 05 min √
Store ---- √
15. Calculations
Total Time= 143 min
Operation Time= 79 min, Transport Time=22 min, Inspection Time= 30 min,
Delay Time =14 min
Efficiency % =
𝑂𝑝𝑒𝑟𝑎𝑡𝑖𝑜𝑛 𝑡𝑖𝑚𝑒
𝑡𝑜𝑡𝑎𝑙 𝑡𝑖𝑚𝑒
=
79
143
× 100 = 55.24 %
16. Questionnaire
Questions SA A N D SD
Material quality of HMC products is good enough. 1 5 2 2 1
Dimensional accuracy is within specified limits. 2 4 3 1 1
HMC is able to ship out products in a given time period. 2 4 1 3 1
Are all design reviewed tested and verified? 1 3 5 2 0
HMC products are reliable. 3 5 3 0 0
HMC manufacture products are low cost as compared to other firms. 4 2 2 2 1
latest technology is being used in HMC. 0 3 4 4 0
HMC has a good benchmark for other relevant firms. 1 4 5 0 1
HMC is meeting all customer requirements. 3 5 3 0 0
Is HMC fulfilling ISO standards? 2 2 1 4 2
19 37 29 18 7
20. Current Sigma Level
Number of units Nu 5,000
Number of opportunities No 04
Number of defects Nd 85
Number of defective units Ndu 53
𝐷𝑃𝑀𝑂 = 1,000,000 ×
85
5,000 × 4
= 4250
• 4250 defects per million opportunities.
• This corresponds to the 3.2 sigma level.
21. ISO Standard
• ISO 9001 certified
• Authorized to use 4 ASME stamps U, U2, S & PP for equipment
manufacturing
22. Conclusion
HMC management has to take some decisions.
• Buy new machinery
• Shift machines from manual to Computer Numerical Control
• Hire highly skilled people
• Follow Six sigma principles