Problem and Needs Identification in Engineering design

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  • 8/12/2019 Problem and Needs Identification in Engineering design

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    Preliminary Research on Customers Needs

    One way to understand needs of thetargeted customers is for the developmentteam to use their own experience andresearch to date.

    Brainstorming is a natural idea generationtool that can be used in the process.

    As a first step, the team brainstormed to

    develop ideas for possible improvementsto the product.

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    Example: CD Case Design Improvements

    A student design team selected the familiar jewel case thatprotects compact discs (CD) in storage as a product needingimprovement.

    The following ideas were generated in response to thequestion: What improvements to the current CD case wouldcustomers want?

    1. Case more resistant to cracking

    2. Easier to open

    3. Add color

    4. Better waterproofing

    5. Make it lighter

    6. More scratch-resistant

    7. Easier extraction of CD from the circular fastener

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    8. Streamlined look

    9. Case should fit the hand better

    10. Easier to take out leaflet describing the CD

    11. Use recyclable plastic

    12. Make interlocking cases so they stack on top of each otherwithout slipping

    13. Better locking case

    14. Hinge that doesnt come apart

    Next, the ideas for improvement were grouped intocommon areas by using an affinity diagram

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    Gathering Information from Customers

    1. Interviews with customers

    2. Web-based research

    3. Mail surveys

    4. Online respondents

    5. Questionnaire

    6. Customer complaints

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    Steps for creating an effective survey

    1. Determine the survey purpose

    2. Determine the type of data-collection

    method to be used

    3. Identify what specific information is

    needed

    4. Design the questions

    5. Arrange the order of questions

    6. Pretest the survey

    7. Administer the survey

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    1. Determine the survey purpose

    Write short paragraph stating the purposeof the survey

    What will be done with the results

    Be clear about who will use the result

    Be clear whether customer want hardstatistics from surveys

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    A group of students in PI 2 is attempting toimprove the design and usefulness of thestandard storage case for compact discs (CD).

    2. Determine the type of data-collectionmethod to be used

    Interviews with customers

    Web-based research Mail surveys

    Online respondents

    Questionnaire

    Customer complaints

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    3. Identify what specific information isneeded

    Each question should have a clear goal

    The following ideas were generated in theresponse to the question: What functions of

    attributes of a CD case need improvement? Case more resistant to cracking

    Easier to open

    Add color

    Better waterproofing

    Make it lighter

    More scratch resistant

    Case should fit the hand

    Use recycle plastic

    Better locking case etc.

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    4. Design the questions

    Each question should be unbiased,unambiguous, clear and brief

    There are three (3) categories of question:

    1. Attitude questions: how the customersfeel or think about something

    2. Knowledge questions: questions askedto determine whether the customerknows the specific about the product orservice

    3. Behavior questions: usually contain

    phrases like how often, how much,when

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    5. Arrange the order of questions

    Arrange the order of questions so that theyprovide context to what are trying to learnfrom customer

    Group the questions by topic and start witheasy ones.

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    6. Pretest the survey

    Before distributing the survey to the customer,always pretest it on a smaller sample

    Avoid poorly wording that may lead

    misunderstanding or questionnaire too long

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    7. Administer the survey

    Whether the people surveyed constitute arepresentative sample for fulfilling the purposeof survey

    What size sample must be used to achievestatistically significant result

    Requires special expertise and experience

    Example: questionnaire

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    Evaluating Customer Surveys

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    Only questionswith more than40% responserate are shown

    Conclusions from Customer Survey

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    Ranking of questions customers are concerned

    crack resistant case (question 1)

    Convenience features of being able to stack the case in astable, interlocking easy (question 14)

    Making it easier to extract the leaflet (question 10)

    Making it easier to extract the CD from the case (question 9)

    Information gathered from customer survey contributes tocreating a ranked list of customer needs.