Assembly c 2 10 1 part e subassembly d part g

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Assembly C (2) (10) (1) Part E Subassembly D Part G Subassembly D (8) (2) (6) (1) Part E Part F Part E Part F (1) (4) (1) (4) Material H Material H (6 inches) (6 inches) = 1x8x2 + 1x2x2 + 1x1x1 = 16 + 4 + 1 = 21 = 6x4x2x2 + 6x4x1x1 = 96 + 24 = 120
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An Indented Bill of Material Level Item Quantity per Parent 0 Product A -- .1 Assembly B 2 ..2 Part E 8 ..2 Subassembly D 2 …3 Part E 1 …3 Part F 4 …4 Material H 6 inches .1 Part G 10 .1 Assembly C 1 ..2 Part G 6 ..2 Subassembly D 1 …3 Part E 1 …3 Part F 4 ….4 Material H 6 inches
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Where Used BOM Directly Showing the “Parenthood” Relationship. This is a Down-Up Approach, Useful When There is a Particular Problem (e.g., Low Inventory Level/ Bad Parts). Three Forms of BOM– Provide Exactly Same Information, Used in Different Conditions. Item Parent Quantity Per Parent Product A -- -- Assembly B Product A 2 Assembly C Product A 1 Subassembly D Assembly B Assembly C 2 1 Part E Assembly B Subassembly D 8 1 Part F Subassembly D 4 Part G Product A Assembly C 10 6 Material H Part E 6 inches
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Work Center Information A work center is a set of one or more machines/works that designed to perform certain processing works. Examples: print center; inspection station; tool booth;…… An essential piece of information about a work center is : How much capacity is available for each planning period?
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Work Center Example A particular work center contains six machines. The work center normally operates two 8-hour shifts per day, five days per week. The maximum allowable overtime is two hours per shift. Thus: Designed Shift Length: Maximum Shift Length: Designed Shift Capacity: Maximum Shift Capacity: Designed Weekly Capacity: Maximum Weekly = 8 (hours) = 10 (hours) = 6x8 = 48 (machine hours) = 6x10 = 60 (machine hours) = 5x2x48 = 480 (machine hours) = 5x2x60 = 600 (machines hours)
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Job Order Routines A routine for a job order: is used to identify the sequence of operations required to produce the item. For each operation, routings provide the following information: 1. Work center where each operation is performed 2. Machine/tooling requirement 3. Operation time (setup and processing time) 4. Alternative routings if available
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Routings Example The following is the routing to print 10 reams (500 sheet/ream) of letterhead stationary with one ink color: Operation # Operation Work Center Setup Time Run Time per Unit Total Operating Time 1 Typesettin g Typesettin g 15 min -- 15 min 2 Proofing Q.C. Dept. 5 min -- 5 min 3 Printing Press Dept. 10 min 4 min/ rn 50 min 4 Inspection Q.C. Dept. -- 0.5 min/rn 5 min 5 Wrapping Bindery Dept. -- 1 min/rn 10 min
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Total Leadtime Total Leadtime: the time period between the time an order is accepted and the time the items are ready for delivery. Total Leadtime consist of : 1. Order preparing time: from order received to order released. 2. Shop flow time from order released to shop to order completed and ready to leave the shop.
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