Operational Research Knowledge Point Summary Unit Comprehensive Test (1)

Multiple choice

1. The idiom of strategizing has been used by wise military commanders in ancient China (a combination of qualitative decision-making and simple quantitative decision-making)
2. The exponential smoothing forecasting method is a (a combination of qualitative and quantitative methods)
3. The weighted average forecasting method is a method (a combination of qualitative and quantitative methods)
4. The maximum minimum principle is used to solve the decision problem of (uncertain) conditions.
5. Which of the following statements about stocking counters is correct?

• Inventory set is the unit of inventory management
• A certain inventory table set can include different one-way inventory
• The inventory desk set method simplifies the work content of inventory management
• The single item of inventory included in each inventory table set is generally the same in number

6. In univariate linear regression prediction, the value range of the correlation coefficient R is generally (-1 <= R <=1)
7. In Ft+1 = Ft+a(Xt-Ft), the value range of a is (0<= a <= 1)
8. There are many expenditures that constitute ordering costs, including: (personnel salary, office expenses, travel expenses, handling fees, fax purchase orders, e-mail, inspection fees, order issuing expenses, procurement staff salaries, procurement staff office expenses)
9. The management of Class C goods in the ABC analysis method of inventory management (roughly)
10. Custody costs are mainly the costs that companies have to bear for owning or keeping inventories.
    Custody costs include: interest on funds invested in inventory. The cost of depreciation due to obsolete inventory or outdated style. The cost of storage space, including heating. Lighting, cold storage and other expenses, storage site and storage equipment depreciation expenses are
    not classified as storage expenses: loans paid for the purchase of inventory
11. The expected value principle is called (Bayesian principle)
12. If there are various possible natural states in the future, and the probabilities of various natural states are known, the decision maker should proceed (decision under risk conditions)
13. The methods to avoid out-of-stock do not include (shorten the lead time)
    . The methods to avoid out-of-stock are: (increase order quantity, order delivery, set safety stock quantity)
14. The principle of maximum minimum is also called the principle of pessimism
15. Regarding bulk purchases in inventory management, what is incorrect in the following statement (bulk purchase reduces the possibility of inventory depreciation losses) is
    correct:

• Large quantities of inventory purchases can get price concessions
• Bulk purchasing reduces the possibility of out-of-stock
• Bulk purchases can save ordering costs

Fill in the blank

1. The method of face-to-face discussion between forecasters is (expert group method), and the method of back-to-back voting is (Delphi method)
2. The principle of pessimism is also called the principle of maximum and minimum, and the principle of optimism is also called (the principle of maximum and maximum)
3. On the one hand, the amount of safety stock decreased (loss of stock loss), and on the other hand, it increased (inventory storage costs)
4. According to the relationship between plan and control, decision-making can be divided into decision-making plan and (controlling decision)
5. (Exponential smoothing method and weighted moving average method) It is both qualitative and quantitative decision-making, that is, a combination of qualitative and quantitative forecasting
6. The economic order quantity is determined by a certain inventory table set or a certain inventory unit (the best order quantity) that makes (total inventory cost) reach the lowest
7. The reorder point has two meanings, one is the meaning of time, and the other is the meaning of (inventory level).
8. Adopting expectation criteria to make decisions, the usual steps are: determining the probability value, calculating the conditional profit, calculating each plan, calculating the maximum expected value with accurate information and calculating the value of intelligence and calculating the value of intelligence.
9. Judging and forecasting methods generally include Delphi method and expert group method.

Glossary

1. Quantitative decision-making
   Quantitative decision-making is a decision made with the help of some formal measurement methods
2. The maximum and minimum decision-making criteria The
   maximum and minimum decision-making criteria can also be called the decision-making criteria of conservatives. With this kind of decision-making, the decision-maker is more cautious and always considers the state of the future after-sales situation, and then chooses the best feasible solution
3. Qualitative decision-making
   is basically a decision made based on the subjective experience or feeling or knowledge of the decision-maker
4. Expert group method The
   expert group method is to form a group among the experts receiving consultation, discuss and negotiate face-to-face, and finally reach a more unanimous opinion on the subject that needs to be predicted
5. Safety stock The
   safety stock can also be called the insurance stock. Safety stock is the amount of extra stock maintained to prevent possible stock-outs

To you dear

We fought, we quarreled, we tortured each other, but I knew we couldn’t be separated and we wouldn’t be separated.