INEG4433_LSN18_08

INEG4433_LSN18_08 - INEG 4433 Systems Engineering and...

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LSN 18 1 INEG 4433– Systems Engineering and Management INEG 4433 Systems Engineering and Mangement Lesson 18: Cost Estimation
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LSN 18 2 INEG 4433– Systems Engineering and Management Exam 24 November, 2007 Submit 5 questions by COB 14 November 2007 Two true/false Two Multiple Choice One short answer There will be some short problems. Review class exercises and homework questions
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© 2005 Monika Lumsdaine Kitchen Lighting Example (not in the Textbook) I.D. #, Rating Type Fixture Location Switching A 3, 20 watt 2-ft fluorescent, triangular under wall cabinets individual B 4, 40 watt 4-ft fluorescent tube on top of cabinets 3-way switch C 2, 75 watt aluminum spotlight 5 ft above sink individual D 1, 20 watt 2-ft fluorescent tube under microwave plug-in cord Table 1 Existing Kitchen Lighting Fixtures Problem Briefing A large Pullman-type kitchen in a 1940s house is quite dark at night, worst at the sink and chopping board located in front of the window. The cherry paneled ceiling has an average height of almost 11 ft and is traversed by a 14 in. x 6 in. wood-laminate beam supporting the flat roof above. All walls, countertops and metal wall cabinets are beige; the vinyl floor has a brownish brick pattern. Bottom cabinets are brick-red. The fluorescent tubes lying on top of the cabinets, as well as the spotlights, are ugly, look cheap, and are hard to clean. None of the lighting fixtures give adequate light for their tasks.
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© 2005 Monika Lumsdaine Problem Definition Statement Improve the general and task lighting in the kitchen while upgrading the lamp quality and matching or complementing the fixture style in the adjacent dining and living rooms, at reasonable cost and without remodeling the kitchen or covering the beauty of the paneled ceiling. Cook Sink Ref. Dining Beam
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© 2005 Monika Lumsdaine Table 2 Pugh Evaluation Round 1: Kitchen Lighting Concepts 1 Track Lighting Install an 8-ft long track with 4 movable spots (50 watt each, black) to match existing track light in adjacent living room. Plug into outlet over cabinet near sink. 2 Sink Task Lighting Replace the two spotlights over the sink with new, nicer-looking, and more efficient practical lamps. 3 Over-Cabinet Strip Lighting Replace the fluorescent tubes with a lighted strip along the top of all wall cabinets. 4 Fluorescent Hanging Fixtures Install two 4-ft fluorescent fixtures with efficient diffusers at 8-ft level (from chains, with wood surrounds) to replace the over-the-cabinet tubes; wire to main switch. Option explored with supplier. 5 Halogen Fixtures Install two hanging halogen down lights; wire to main switch; match chrome style of under-cabinet triangular fixtures. Option explored with supplier. 6 Brighter Surfaces Paint walls white; install white vinyl flooring; install new white countertop; paint cherry panels in ceiling while.
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© 2005 Monika Lumsdaine Table 3 Pugh Method Round 1 Kitchen Lighting Concept Evaluation # Criteria Now 1 2 3 4 5 6 1 Adequate sink task lighting S + + + 2 Other countertop lighting S + + 3 General lighting S S S + + +
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INEG4433_LSN18_08 - INEG 4433 Systems Engineering and...

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