An engineering decision is made carefully and on the basis of evidence.

a$.$ List the steps in the decision process we would use to decide whether to

use the $3$ tier or $4$ tier version of the J$2$EE architecture style for our design

of the Model module for CTAS.

b$.$ How is the quality of such a decision evaluated?

c$.$ List the two highest priority criteria you used in making the decision about

which of the three architectures $($J$2$EE$,$ SOA, Grid$)$ to use for the Model

module. Justify why each is a valid high priority criteria given the goals

and priorities for CTAS.

d$.$ We begin with a standard architecture but then we modify it to tailor it to

the specific problem. Justify our decision to split the View module of

MVC into two modules. Use specific criteria and list both the qualities

that are enhanced and those that are degraded.