2. breakeven analysis;

3. Plan review method;

4. Income matrix decision-making;

5. Queuing model;

6. Other methods.

(1) and other possible methods;

(2) Take the large and medium as the solution (optimistic method);

(3) start from a small place (pessimistic method);

(4) optimistic coefficient method;

(5) Savage method (the method of taking the minimum regret value).