CASE STUDY FOR DEVELOPMENT OF CUSTOMIZED CHECKLISTS
Achieving the twin goals increasing the usability while reducing the cost is neither solely a marketing problem nor solely a design/manufacturing problem.It is a product development problem involving all activities simultaneously.

Gauging User Requirements
*stiffness
*smooth shifting
*steady handling

Ease of use requirements
*comfort
*adjustability
*quick adjustment of seat height
*good shock absorption

Aesthetic requirements
*appearance
*shape
*cleanliness
*smoothness

Reliability requirements
*the bicycle should be able to function under varied road surface conditions.
*the bicycle shifting should be crisp and smooth.
*the brake cable should be sturdy

Maintainability and serviceability requirements
*low maintenance
*easy removal
*accessibility

Braking-brings the bike to a stop smoothly and predictably.If breaking is too hard it can throw a rider to the front and lift the rear wheel of the ground.Slow braking is equally hazardous.

PRODUCT AND PROCESS CHARACTERISTICS
The product features design into the bicycle.The important parts of a bicycle are the frame.,fork,wheels,drive train,and the brakes.The frame provides the structural base for the entire bike.

Development of Usability and Design Checklists
Input obtained user interaction,as outlined preceding section,was used to determine the wants and needs of customers and to obtain design/manufacturing links/determine by analysis based on usability transformation matrices.Usability and design/manufacturing information through this interaction was translated into appropriate questionnaires.

Gauging User Requirements
*stiffness
*smooth shifting
*steady handling

Ease of use requirements
*comfort
*adjustability
*quick adjustment of seat height
*good shock absorption

Aesthetic requirements
*appearance
*shape
*cleanliness
*smoothness

Reliability requirements
*the bicycle should be able to function under varied road surface conditions.
*the bicycle shifting should be crisp and smooth.
*the brake cable should be sturdy

Maintainability and serviceability requirements
*low maintenance
*easy removal
*accessibility

Braking-brings the bike to a stop smoothly and predictably.If breaking is too hard it can throw a rider to the front and lift the rear wheel of the ground.Slow braking is equally hazardous.

PRODUCT AND PROCESS CHARACTERISTICS
The product features design into the bicycle.The important parts of a bicycle are the frame.,fork,wheels,drive train,and the brakes.The frame provides the structural base for the entire bike.

Development of usability and design checklists
Input obtained user interaction,as outlined preceding section,was used to determine the wants and needs of customers and to obtain design/manufacturing links/determine by analysis based on usability transformation matrices.Usability and design/manufacturing information through this interaction was translated into appropriate questionnaires.

DATA COLLECTION
The users who participated in the study had used bicycles for at least a couple of years.All were with the use repair and maintenance of bikes.The subjects belonged to both genders.They evaluated the usability of bicycles that they used regularly for commuting or trekking. The reliability was tested by measuring the internal consistency of the score for each questionnaires.The CRONBACH coefficient alpha methods was to test for reliability.

RESULT
The cronbach coefficient alpha values for the evaluation questionnaires for usability attributes (functionality,ease of use,aesthetics,reliability,maintainability and serviceability,environmental friendliness,recycleability and disposability and customizability.)
The correlation between the average score and the overall score for each of the nine usability evaluation questionnaires was found to be significant.

CONCLUDING REMARKS
Tn an increasingly competitive world,design lead time is on a continuous decline in an ever increasing push to get new products to market quicker.This means that the unos is now on the manufacturer to develop a highly usable product right,the first time.The checklist based approach provides a heuristic method to tell the designer what to expect in a product to adopt the most appropriate design and relate manufacturing process to user requirements. The cases presented in this chapter develop and tested questionnaires for each usability dimension.The practical implication of the overall usability score is that it can be used as a criterion for product selection.