Changing a bed sheet poses two problems1) Process Problem :- difficult and hard work to lift up a heavy mattress when changing2) Function Problem :- the bed sheet is disorder and not in good shape after night sleep

Quick & Easy

Maintain neatness & tidiness

Increase housekeeper’s productivity

Avoid injuries & harmful

Affordable & marketable productYoung kids able to

perform

Problem

FunctionProcess Analysis

Cause & Effect Chain Analysis

Zone of Conflict

Sub Field Model

Smart Little People

Function Oriented Search

Zone Useful : the mattress

Zone Harmful : Mattress Sides

Mechanical Field

MattressS1

Bed SheetS2

Mechanical Field

MattressS1 ?

Bed SheetS2

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The SLP either needs to * hold (mechanically) * adhere (chemically)* stick (mechanically)* connect (mechanically) the bed sheet to the mattress

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- Add substance to the bed sheet- The substance needs to have the capability to hold, adhere, stick or connect the bed sheet with the mattress.

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Function Oriented Search was selected

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Step 1 : Background of the problem

Changing and fitting bed sheets is a tough job

Step 2 : Desired characteristic of new system

- Quick and easy- Maintain the tidiness- Simplify the process

Step 3 : Identify the problem(Problem Statement)

Step 4 : The function to be performed

- to cover the mattress- able to change & replaced easily- Remain net and tidy all the time

Step 5 :Formulate the required parameters

- Faster - Neat and Tidy

- Low Cost

Step 6 :Generalize the function

- Changing process should be quick and easy

Step 7 :Identify leading technologies which

perform the similar function- Google search

Step 8: Adapt the solution to the specific system.

No. Type Pros Cons

1. Temporary Fabric Adhesive Spray • Fast • Easy• Simple

• Fume• Bad Smell • Non reusable• Non-ecofriendly• Might cause skin allergic• Need to spray on the bed sheet and mattress and its

take time

2. Toupee Tape • Simple• Easy to

apply and remove

• Non reusable• Hold for less than 24 hours• Non-ecofriendly• Need to align the tape on both side of mattress and

bed sheet will take time

3. Velcro • Simple• Cheap

• Lift span is short• Less holding forces• High possibility to damage bed sheet fabrics when

washer is used• Need to align the Velcro and it takes time

4. Zip • Easy to get• Cheap

• The steel on the zip will rust• Life span is short• The teeth of zip easy spoil• Need to align the zip and it takes time

No. Type Pros Cons

5. Cloth Button • Easy to get• Cheap• Variety• Simple

• Changing bed sheet take longer time to fasten• The surface of the bed sheet is not smooth when

button up• Easy to lose as its touchable on the surface of bed

sheet• Is not convenient to old people who has poor

eyesight

6. Snap Button • Easy to get• Cheap• Great

holdingforces

• Will spoilt after long time use

7. Stripe • Cheap • Easy to lose• Holding force not great• Take long time to fasten the strip