Bill Of Materials, Budgeting And Purchase Requisitions For Senior Design

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Bill of Materials, Budgeting and Purchase Requisitions for Senior Design http://www.srdesign.uncc.edu/student.html James M. Conrad, ECE; Frank Skinner, ME; Daniel Hoch, ET; Martin Kane, Civil Eng.

Outline Introduction – Motivation Bill of Materials Engineering Budget UNCC Purchase Requisition What’s Next

Introduction A budget is essential in determining and managing a project’s cost. It categorizes where money on a particular project is being spent. A bill of material identifies the individual pieces of a product that must be purchased or manufactured. A purchase requisition is the paperwork required to initiate a purchase.

Bill of Materials (from Wikipedia) A bill of materials or bill of material (abbreviated "BOM") describes a product in terms of its assemblies, subassemblies, and basic parts. Basically consisting of a list of parts, a BOM is an essential part of the design and manufacture of any product. Parts required to build a deliverable end product are included on the BOM. Developmental tools are not included (i.e. software, tools, etc).

Bill of Materials (continued) Often, BOMs contain hierarchical information with a top level BOM describing a list of components and sub-assemblies. PC Example: Top Level BOM 1) shipping box 2) manual 3) packaging 4) packaging labels 5) actual PC PC Sub-Assembly BOM 1) motherboard 2) power supply 3) processor This increasing level of detail continues for all sub-assemblies until it reaches its constituent parts (like resistors or processors), or modules that are out of the scope of the BOM (like the parts that make up a fan that is brought in as a module from another manufacturer).

Bill of Materials (continued) BOMs are important, since without a basic knowledge of how many parts a product needs, there is no way of knowing how many units of that part you need to buy.

Bill of Materials Example: Man Powered Scooter Main Component Groups 1. Handle Bar Assembly 2. Steering Assembly 3. Frame Assembly 4. Front Wheel Assembly 5. Rear Wheel Assembly 6. Brake Assembly

Top Level Bill of Materials UNC Charlotte Senior Design Project Bill of Materials for End Project 10/06/2006, Rev A Project: Scooter Top Level Item Handle Bar Assembly Steering Assembly Frame Assembly Front Wheel Assembly Rear Wheel Assembly Brake Assembly Total Qty 1 1 1 1 1 1 Price per 3.39 6.29 7.79 6.15 5.79 5.12 Total 3.39 6.29 7.79 6.15 5.79 5.12 34.53 Source Sub-Assembly Sub-Assembly Sub-Assembly Sub-Assembly Sub-Assembly Sub-Assembly

Front Tire Assembly Bill of Materials UNC Charlotte Senior Design Project Bill of Materials for End Project 10/06/2006, Rev A Project: Scooter Front Tire Assembly Item Tire Rim Valve Stem Valve Stem Cap 5/16-18 Axle Nut 5/16 Flat Washer Brass Bushing Lubricant Axle Total Qty 1 1 1 1 2 2 1 1 1 Price per 1.12 1.26 0.11 0.06 0.13 0.04 1.01 0.14 2.11 Total 1.12 1.26 0.11 0.06 0.26 0.08 1.01 0.14 2.11 6.15 Source ABC Tire Company XYZ Rim Company McMaster Carr McMaster Carr McMaster Carr McMaster Carr MSC Industrial MSC Industrial In-House

Budget (from Webster’s) A Budget is: 1.an estimate, often itemized, of expected income and expense for a given period in the future. 2.a plan of operations based on such an estimate. 3.an itemized allotment of funds, time, etc., for a given period. 4.the total sum of money set aside or needed for a purpose: the construction budget.

Budget (Continued) UNC Charlotte Senior Design Project Budget 10/6/06, Rev A Category/Item Development Materials 1/2" diameter 2 flute end-mill 5/16-18 die 1/8" diameter TIG welding tungsten 1/16" diameter T-6061 welding rod Project: Scooter qty 1 1 3 10 price per 18.79 5.83 1.12 2.79 BOM materials for demonstration From Top Level BOM sheet, needed xx/xx/xx total 18.79 5.83 3.36 27.90 34.53 90.41 Parts and materials total Labor Student time Mentor time Sponsor time Total labor Total parts, materials, and labor 500 25 25 100.00 150.00 150.00 50,000.00 3,750.00 3,750.00 57,500.00 57,590.41

Labor Overhead What’s included in labor overhead (i.e. hourly rate) Your salary Your health benefits Your vacation pay Your taxes (FICA) Your retirement (i.e. 401K match) Corporate PC and PC support (i.e. networking, software) A portion of your manager’s labor A portion of the corporation’s general expenses (i.e. rent, heating, taxes).

PURCHASE REQUISITION Prepared UNCC Purchase Requisition Page 1 PURCHASE ORDER NO. DATE: 10/6/06 REQUISITION NO. BSS Recvd DATE: FUND / INDEX NUMBER FORWARD THIS FORM TO YOUR DEPARTMENTAL BSS / OTHER RESPONSIBLE PARTY Project: Scooter DEPARTMENT Senior Design Program BLDG. / ROOM Senior Design Program MARK FOR TELEPHONE ITEM NO. 1 QUANTITY 1 UNIT 1 2 1 1 3 1 10 4 1 DESCRIPTION 10 Valve Stem PN: 12357A123 Valve Stem Cap PN: 45612A98 5/16-16 Axle Nut PN: 58647A34 5/16 Flat Washer PN: 68974A100 UNIT PRICE TOTAL PRICE 0.11 0.11 0.06 0.06 1.30 1.30 0.40 0.40 5 6 Only 1 vendor per purchase requisition 7 8 9 10 Funds for this purpose in the amount of order total will be reserved in the account(s) listed. PG 1 SUB-TOTAL (If funded from more than one account, list accounts and amounts OR percentage by account.) Acct 1 Acct 2 Acct 3 Account % 1.87 Amount PG 2 SUB-TOTAL O R Tax (if needed) ORDER TOTAL Suggested Vendors: 1.87 McMaster Carr Sole Source, attach justification on next sheet or attach as separate file. Form attached to your email indicates your approval. If manually submitted, an authorized individual' s signature is required: Rev 4-05

What is next? October 13th: Designs and Design Reviews Lecture Project Risk Assessments are due

Top Level Bill of Materials UNC Charlotte Senior Design Project: Scooter Project Bill of Materials for End Project 10/06/2006, Rev A Item Qty Price per Total Source Handle Bar Assembly 1 3.39 3.39 Sub-Assembly Steering Assembly 1 6.29 6.29 Sub-Assembly Frame Assembly 1 7.79 7.79 Sub-Assembly Front Wheel Assembly 1 6.15 6.15 Sub-Assembly

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