Texas Center for Applied Technology 1 - TEES/CCAD Proprietary Information Work Measurement and Process at a Glance in Lean (A case study at the Corpus Christi Army Depot by Texas A&M Engineering) Harry S. Whiting II, MSIE Fred Canales, BSIE Dr. J. J. Congleton, PhD, CPE, PE
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Texas Center for Applied Technology
1 - TEES/CCAD Proprietary Information
Work Measurement and Process at a Glance in Lean
(A case study at the Corpus Christi Army Depot by Texas A&M Engineering)
Harry S. Whiting II, MSIEFred Canales, BSIE
Dr. J. J. Congleton, PhD, CPE, PE
2 - TEES/CCAD Proprietary Information
Texas Center for Applied Technology
Lean Process
• Preparation for Lean Event• Value Stream Analysis• Prep work for process analysis
Job Description IN OUT Minutes Seconds MinutesSeconds CATEGORY Obs.T. Frq. Pr Eng.A Preperation
1 Go to inventory bins to get parts 50 0 0 0 27 T 0.45 1 0.452 Gathering all parts needed 0 27 1 28 PR 1.02 1 1.023 Go to workbench 50 1 28 1 43 T 0.25 1 0.254 Take parts out of bin 1 43 2 10 PR 0.45 1 0.455 Verify numbers match for housing 2 10 5 50 I 3.67 1 3.676 Verify numbers match for rotating seal and output shaft 5 50 8 24 I 2.57 1 2.577 Verify numbers match for bearing (1 of 2) 8 24 14 45 I 6.35 1 6.358 Verify numbers match for bearing (2of 2) 14 45 16 28 I 1.72 1 1.729 Go to QC table 20 16 28 16 35 T 0.12 1 0.12
10 Sell bearings 16 35 17 25 I 0.83 1 0.8311 Go to workstation 20 17 25 17 33 T 0.13 1 0.1312 Open package of common hardware 17 33 18 30 PR 0.95 1 0.9513 Clean common hardware 18 30 21 7 CNVA 2.62 1 2.6214 File down transfer tube 21 7 22 30 O 1.38 1 1.3815 Inspect bearings (inspector) 22 30 23 30 I 1.00 1 1.0016 Consult with inspector 23 30 24 20 I 0.83 1 0.8317 Put away paperwork 24 20 25 21 PR 1.02 1 1.02
Subtotal 140 25.35
B Prepare bearings for oven1 Open O-ring package 25 21 26 43 PR 1.37 1 1.372 Install O-rings onto transfer tube and jets 26 43 27 42 O 0.98 1 0.983 Oil up 2 jets and install in housing 27 42 29 40 O 1.97 1 1.974 Go to parts bin (get piston rings) 46 29 40 29 55 T 0.25 1 0.255 Get piston rings 29 55 30 3 T 0.13 1 0.136 Go to workbench 30 3 30 17 T 0.23 1 0.237 Install piston rings on housing 30 17 31 23 O 1.10 1 1.108 Measure bearings (micrometer) 31 23 32 57 I 1.57 1 1.579 Place hardware onto bearings (to put in oven) 32 57 33 22 O 0.42 1 0.42
10 Measure rotating seal (micrometer) 33 22 34 24 I 1.03 1 1.03
Job Description IN OUT Minutes Seconds MinutesSeconds CATEGORY Obs.T. Frq.3 Wash PTO gearshaft in booth 13 57 16 22 CVA 2.42 1
3 Inspect PTO gearshaft (make sure serial # matches) 4 0 6 0 I 2.00 15 File down gear (double check if gear is good/bad) 7 0 7 44 I 0.73 17 Inspect PTO gearshaft (good/bad) 10 30 12 52 I 2.37 16 Inspect serial numbers match (double-checking) 17 30 18 12 I 0.70 15 Inspect bearing and serial #'s match 43 43 44 12 I 0.48 15 Sell to inspector 64 20 65 15 I 0.92 1
7 Sandblast stencil onto PTO gearshaft 32 43 33 49 O 1.10 12 Install damper ring onto PTO gearshaft 38 30 41 15 O 2.75 17 Install bearing onto PTO gearshaft using press machine 44 55 46 25 O 1.50 19 Torque bearing onto PTO gearshaft 47 44 50 8 O 2.40 11 Perform 1st run (backlash test)/ record results 50 8 53 37 O 3.48 12 Perform 2nd run (backlash test) / record results 53 37 54 37 O 1.00 13 Perform 3rd run (backlash test) / record results 54 37 56 43 O 2.10 1
7 Paperwork (fill out A&I sheets) 18 12 21 27 P 3.25 14 Paperwork (stamp A&I sheets) 56 43 64 20 P 7.62 1
1 Prepare to wash PTO gearshaft in varisole booth 12 52 13 30 PR 0.63 15 Dry PTO gearshaft 16 50 17 30 PR 0.67 13 Grease up PTO gearshaft 41 15 41 52 PR 0.62 14 Open package for bearing/put on latex gloves 41 52 43 43 PR 1.85 16 Put away paperwork 44 12 44 55 PR 0.72 11 Prepare PTO gearshaft for sandblast (apply tape ) 21 27 23 37 PR (SB) 2.17 13 Make stencil for part # and serial # 25 16 27 25 PR (SB) 2.15 14 Cut/Tape stencil onto PTO gearshaft 27 25 32 3 PR (SB) 4.63 1
• Delivery• Located @ point-of-use (POU)• Issued to mechanic• Returned empty for refill
• Contents• Everything required for Job• In the quantities needed
31 - TEES/CCAD Proprietary Information
Texas Center for Applied Technology
Kitting (Con’t)
• Presentation • In the sequence used• Cart, container, bins, etc.
• Kit design:• Perform work right to left• Visually signal job status• Color code all labels• Mistake proofing
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Texas Center for Applied Technology
Identify Parts Needed
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Texas Center for Applied Technology
Shadow Parts
Left: Finished Parts Present-ation
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Identify Tool Requirements
Tools for task being laid out for shadowing
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Texas Center for Applied Technology
Shadow Tools
Working Smarter not Harder
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Identify New Layout
E&E and Prep WorkstationStaging for Assy
E&E Tools
Assy Tools
Assy Workstation with Special Tools
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Texas Center for Applied Technology
Document Standard Work
• Key to productivity of the whole value stream.
• Standard Process for performing work tasks hour by hour, day to day, week to week.
• Process At A Glance allows simple documenting of standard work methods.
• Can be used by operators for training or guidance.
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Texas Center for Applied Technology
Kaizen Events in action
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Texas Center for Applied Technology
Continuous Improvement
•Know where value is created (or lost)•Start with the end in mind•Identify the high leverage opportunities•Use the lean tools•Stay on course…lean takes time•When you think you are done…time to
start again!
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Texas Center for Applied Technology
Conclusion
• Work Measurement Standards historic or new help set up Process At A Glance events quickly.
• Process At A Glance allows processes with a lot of variability to be standardized.
41 - TEES/CCAD Proprietary Information
Texas Center for Applied Technology
Conclusion Con’t
• Process At A Glance allows quick sustainable gains in productivity.
• Process At A Glance sets up future events to level load and create assembly lines.