(1) General. The test for feasibility (see page 31) is concerned with whether the course of action is practicable. Has it reasonable chances of success under the particular circumstances? Are the difficulties surmountable? Is it easily practicable, practicable with some difficulty, or very difficult? The commander, if he concludes that the course of action is not a practicable one, rejects it from further consideration in the estimate of the situation. However, care is taken at this point not to dismiss, abruptly, courses of action which may later be combined advantageously with one or more others. Here, again, as noted for the suitability test, the commander may sometimes profitably analyze the course of action by breaking it down into more detailed operations. As a result of the tests discussed above, the commander is able to make a list of courses of action upon which his confirmed judgment has bestowed the qualities of suitability and feasibility. He is also able to take stock to see how many of the solutions are complete, how many are incomplete, and in the latter case to what extent they constitute partial solutions. It is, of course, desirable to have as many complete solutions as possible, and at this point it may be possible to merge two or more incomplete solutions into a single course of action which better fulfills the test of suitability. The commander can also take stock, similarly, of the degree of feasibility, already referred to, as to the retained courses of action. (2) Details, (a) Prospects of Success. Here the several courses of action are considered relatively, with respect to the chance of success in each. In the rating of courses on this basis, the commander excludes consideration of losses except as they may influence success or failure. He notes, however, his considered expectations as to losses. Losses may appear to be so great that success is doubtful. Certain courses of action may be particularly vulnerable to enemy opposition because of the types of weapons involved or because of favorable enemy positions. Choice of such a course would permit the enemy an initial advantage. (b) Facility of Execution. This subject has to do with the relative ease or difficulty of carrying out the several courses of action. On the basis of the existing situation, each course of action may be compared with all the others to determine their relative merits with regard to the facility of execution. Consideration is given to the action involved against the several physical objectives; to the movements needed in making new dispositions; to the relative adequacy of the forces as to numbers and types of weapons; and to the measures required for freedom of action.