Evaluative arguments
A Formula
In evaluating a situation, event, or item, you are making claims about its value, whether good or bad, effective or ineffective. Using a formula, we might say
X is (or is not) a good Y because it has (or does not have) features A, B, C, and so on.
Note that the difference between an evaluative claim and a definitional claim is the existence of the adjective good, which places a value on the Y term. Let's compare the two with the example of burglary.
A person is a burglar if s/he (1) enters a building and (2) intends to steal something.
A person is a good burglar if s/he (1) meets the definition of burglar and (2) does not get caught.
The criteria are not exactly the same because in the second one I am adding a criterion of success, which is a value. Actually, we might not need the criterion of the definition if all are agreed.
In addition, in an evaluative claim, we are not so much concerned with necessary and sufficient criteria as we are with criteria that are appropriate. For this reason, you may need to explain, perhaps even argue, why these criteria are appropriate, why you chose certain criteria as opposed to other criteria that might be expected by your audience.
Some tips to help you
As your paper is an argument, be sure that at least some readers will initially disagree with your position. Otherwise, it's not an argument.
Because you are taking a position that some disagree with, it's important to address rebuttals. These rebuttals may be the positions that others take, or they may be parts of your own position--claims, evidence, or reasons--that readers may disagree with.