product design development 4 pptx

ETM 551 Product Design and Development -Lecture 4 1 Product Design & Development Product Specifications ETM 551 Product Design and Development -Lecture 4 2 What are specifications? • Specifications spell out in precise, measurable detail what the product has to do. • Specifications represent an unambiguous agreement on what the team will attempt to achieve in order to satisfy the identified customer needs. • Must include regulatory and agency approval requirements ETM 551 Product Design and Development -Lecture 4 3 Concept Development Process Mission Statement Perform Economic Analysis Benchmark Competitive Products Build and Test Models and Prototypes Identify Customer Needs Establish Target Specifications Generate Product Concepts Select Product Concept(s) Set Final Specifications Plan Downstream Development Test Product Concept(s) Development Plan Target Specs Based on customer needs and benchmarking Final Specs Based on selected concept, feasibility, models, testing, and trade-offs ETM 551 Product Design and Development -Lecture 4 4 Product specifications • Other names for ‘product specifications’ – Product requirements – Technical specifications ETM 551 Product Design and Development -Lecture 4 5 Product Specifications Example: Mountain Bike Suspension Fork ETM 551 Product Design and Development -Lecture 4 6 A specification • A ‘specification’ (sing.) consists of a metric and a value Example: metric → “Average time to assemble” value → “less than 75 seconds” ETM 551 Product Design and Development -Lecture 4 7 When are specs established? • For simple products (e.g., soap): early in the development process, right after identifying customer needs • For technology-intensive products: at least twice … ETM 551 Product Design and Development -Lecture 4 8 For technology-intensive products • Target specifications – (representing hopes and aspirations) are set immediately after the team has identified the customer needs it aims to meet. • Refined specifications – (i.e., the specs the team aims to achieve) are documented in the project´s “contract book”. ETM 551 Product Design and Development -Lecture 4 9 Target specifications To establish target specs: • Prepare list of metrics, using the needs/metrics matrix. • Collect benchmarking information. • Set ideal and marginally acceptable target values for each metric. • Reflect on results and process. ETM 551 Product Design and Development -Lecture 4 10 Metrics • Prepare a list of metrics The underlying assumption is that consumer needs can be translated into precise, measurable specs and that meeting specs will result in satisfaction of the associated customer needs. [...]... kN/m 8 550 3.6 13 0 28 41 .5 59 1 .40 9 295 15 10 760 500 3.2 3.7 11.3 12.6 0 0 48 43 39 38 110 85 1.385 1 .40 9 550 42 5 15 710 3.3 11.2 200 46 38 85 1.3 64 425 9 48 0 3.7 13.2 0 33 43 .2 65 1.222 325 13 680 3 .4 11 0 38 39 130 1.1 650 in 1.000 1.125 1.000 1.125 1.250 1.000 1.125 1.000 1.125 1.250 1.000 1.125 NA 140 165 190 215 150 170 190 210 150 190 210 220 NA 26in 1.75 35 none 4 26in 1.5 45 none 3 26in 1.5 35... ETM 551 Product Design and Development -Lecture 4 22 Technical models Develop technical models of the product: • A technical model is a tool for predicting the values of different metrics for a particular set of design decisions – As used here, a ‘model’ may be an analytical or physical approximation of the product ETM 551 Product Design and Development -Lecture 4 23 ETM 551 Product Design and Development. .. 551 Product Design and Development -Lecture 4 34 Summary • Final specifications are developed by assessing the actual technological constraints and the expected production costs using analytical and physical models ETM 551 Product Design and Development -Lecture 4 35 Summary • Five step process for refining specifications – Develop technical models of the product – Develop a cost model of the product. .. ETM 551 Product Design and Development -Lecture 4 16 Benchmarking • No product development team can expect to succeed without ‘benchmarking’ the project against competing products – Warning: Data in competitors’ catalogues and supporting literature may not be accurate Values for key metrics should be verified by independent testing and observation ETM 551 Product Design and Development -Lecture 4 17 1... 70 ST Tritrack 60 ideal values 50 3 3.2 3 .4 3.6 3.8 4 Score on Monster (Gs) Score on Monster (Gs) ETM 551 Product Design and Development -Lecture 4 28 Crunch Perceptual Mapping Exercise KitKat Nestlé Crunch Opportunity? Hershey’s w/ Almonds Hershey’s Milk Chocolate Chocolate ETM 551 Product Design and Development -Lecture 4 29 Set Final Specifications 1 2 3 4 5 6 7 8 9 10 METRIC Attenuation from dropout... engineering metrics ETM 551 Product Design and target and final specs Development -Lecture 4 benchmarking on needs 31 Reflect on results and process • Are team members ‘gaming’? • Should team consider offering multiple products? • Are any specification missing? ETM 551 Product Design and Development -Lecture 4 32 Reflect on results and process Is the product a winner? – Product concept should allow... ETM 551 Product Design and Development -Lecture 4 Imp 3 2 5 3 4 4 4 2 5 1 1 12 … but remember • Metrics should be dependent, NOT independent, variables • Metrics should be practical • Some needs cannot be easily translated into quantifiable metrics (subjective needs) • Metrics should include popular criteria used for ‘marketplace’ comparisons ETM 551 Product Design and Development -Lecture 4 13 Metric... stiffness at brake pivots 11 Headset sizes 12 13 14 15 16 Units dB N g s N-s/m mm mm kN/m kg kN/m in Steertube length Wheel sizes Maximum tire width Time to assemble to frame Fender compatibility ETM 551 Product Design and Development -Lecture 4 mm list in s list Value >12 650 75 42 5 1.000 1.125 150 170 190 210 230 26in >1.75 . ETM 551 Product Design and Development -Lecture 4 1 Product Design & Development Product Specifications ETM 551 Product Design and Development -Lecture 4 2 What are specifications? •. 551 Product Design and Development -Lecture 4 4 Product specifications • Other names for product specifications’ – Product requirements – Technical specifications ETM 551 Product Design and Development. quality • Ease of use ETM 551 Product Design and Development -Lecture 4 16 Needs vs. Metrics ETM 551 Product Design and Development -Lecture 4 17 Benchmarking • No product development team can expect