The following Design methodology was used for the project so that results are innovative and project brief can be met effectively:

• Situation analysis: understanding and evaluating need for a new concept.

• Product proposal: The product proposal is made for the lacunae area, new design for the CAL bus in this project.

• Data collection and analysis: The data collection stage included study of present scenario for user, usage and environment then the collected data has to be analyzed for proper inferences and probable design solutions.

• Idea generation: The idea sketches are generated for solving the problems as derived from analysis.

• Concept development and exploratory modeling: Then clustering and evaluating of the idea sketches were made so as to sort out the best effective solution. After this stage concepts are made which have the more informative representation of the proposed product.

• Product detailing: The final selected concept is further taken forward for detailing.

• Evaluation and improvement‐The evaluation of product concept is made by mock up model analysis and user feedback. Thus, further refinement is made in the product.

• Final Prototype development: The final stage includes generation a prototype which provide a feel of the product.