This is part 2 of the assignment


You should have a good idea of what your users' needs are from the previous 
discussion of your chosen interface. You now need to redesign it.


1.	Make sure you can identify your users, the environment in which they will 
    be working, the tasks they need/want to carry out. Document these details. 
    (See Faulkner's classification of users)
2.	Consider task  analysis under the headings of Goal, Task, Action. Decide 
    which tasks are for the system and which are for the user
3.	Decide on a design methodology and justify it
4.	Define your functional, data and usability requirements
5.	Apply appropriate design principles to the interface
6.	Use suitable means for communicating your design at various stages


Be prepared to discuss the above with your group next week

The ideas involved with redesigning the lighter based on both zippo and Bic Gas come from evaluating both the good and the bad points from each one. Both types of lighter have their preferential users for many reasons, and the lighter will function accordingly. the majority of users will use the lighter for lighting cigarettes but the design of the lighter must reflect other uses for which a lighter is often used EG

• lighting a gas or log fire
• emergency light source,
• heat source for melting frozen car locks
• soldering wires together when an iron is not available

Environmental considerations are based on where the users would expect to use a lighter. The answer *anywhere* was not so easy to accomodate, due to the nature of the item it would be dificult to maintain a flame in very windy or wet conditions. It is also an important consideration to make the lighter safe to store in a pocket when not being used.

The Tasks the users needed to be able to carry out included

• Refuelling the lighter
• inexhaustable ignition mechanism
• no handed use
• easy regulator adjustment
• non orientated operation (the lighter must be able to function on its side for short periods)

Goal
Produce a design for a lighter eliminating or reducing usability errors and floors taking possible lack of user dexterity in to consideration

Task
To redesign the lighter taking experience from the design of the disposable gas lighter and the zippo lighter, other design influences may be used.

Action
Evaluation of the gas and zippo lighters for positive design factors, and brainstorm to redesign factors not covered by previous evaluation.

The design methodology used will be a repeated horizontal design, each design function will be assessed, evaluated and redesigned in turn with respect to the previous design until all requirements have been met satisfactarily.