$-12\mathrm{.}2.$ Consider one of the following interactive applications $($or an application assigned by your instructor$)$:

A desktop publishing system

A computer$-$aided design system

An automated course registration system for a university

A library management system

An Internet$-$based polling booth for public elections

A home banking system

Develop a user model, design model, mental model, and implementation model, for any one of these systems.

Regardless of the technique used to create the user task model, a model describing the users' actions using the operators $($keys pressed, mouse operations, menu selections, icon manipulations, commands typed$)$ available in the proposed computer system should be built for each usage scenario.

$12\mathrm{.}3.$ Perform a detailed task analysis for the system you chose in Problem $12\mathrm{.}2.$

$12\mathrm{.}4.$ Create a customer journey map for the system you chose in Problem $12\mathrm{.}2.$

$12\mathrm{.}5.$ Continuing Problem $12\mathrm{.}2,$ define interface objects and actions for the application you have chosen. Identify each object type.

$12\mathrm{.}6.$ Develop a set of screen layouts and organize them into a storyboard for the system you chose in Problem $12\mathrm{.}2.$

$12\mathrm{.}7.$ Use a prototyping tool like PowerPoint or Keynote to create a prototype for the storyboard you created in Problem $12\mathrm{.}6.$ Page links, form elements, etc. can make the prototype interactive. Feel free to experiment but this aspect is not required.

$12\mathrm{.}8.$ Describe your approach to user help facilities for the task analysis design model and task analysis you performed as part of Problems $12\mathrm{.}3,12\mathrm{.}4,$ and $12\mathrm{.}5.$

$12\mathrm{.}9.$ Provide a few examples that illustrate why response time variability can be an issue.

$12\mathrm{.}10.$ Develop an approach that would automatically integrate error messages and a user help facility. That is$,$ the system would automatically recognize the error type and provide a help window with suggestions for correcting it$.$

$12\mathrm{.}11.$ Develop an interface evaluation questionnaire that contains $15$ generic questions that would apply to most interfaces. Add $5$ more questions specific to your application.