GAS can not only cause pharyngitis, or sore throat, but also headache, stomachache, and a general feeling of fatigue and crumminess. A rash may also appear within seven days of becoming ill; this rash is NOT the same thing as âscarlet feverâ.
Conceptual model in which statistically valid task selection criteria is applied to identify individual tasks critical to the performance of a specific job.
These tasks are chosen early in the design effort, then used to raise issues about the design, to aid in making design decisions, and to evaluate the design as it is developed. The steps in the task-centered design process are as follows: 1  figure out who's going to use the system to do what. 2  choose representative tasks for task-centered design. 3  plagiarize. 4  rough out a design. 5  think about it. 6  create a mock-up or prototype. 7  test it with users. 8  iterate.