Soft exam information system project manager_ Management Science (Operations Research) 2--- senior information system project manager of soft test 034

management science ( Operations research ) Very important , That is to say, we should learn from the previous chapter , management science ( Operations research )2 Of this chapter , Just try to master it .

management science ( Operations research )2 Is more difficult than management science ( Operations research ) Is much more difficult .

You can see this question

1. First of all, we can put C Select it as the head , Because it needs to be processed with a lathe first , and C It takes the least time to use a lathe , He ran out , others

Ability to use , So if you don't want the process stuck in the lathe, you need to do the work that takes the shortest time first , That is to say C As the head

2. And then look at it , First use the lathe , Then use milling machine to process , It shows that the milling machine processing must be the tail , So we find the minimum time to use the milling machine

Start , As you can see, yes 1 Right , Because when the smallest milling machine is used up, it means that all parts have been processed , You can get off work , No more man hours .

3. So now C It's the head B It's the tail , Then choose , In the same way , Let's choose , The rest use the smallest lathe , As you can see, yes D Right ,D Using a lathe 4 Hours , So now C D _ B Confirmed. , The answer has come out

C D A B The order of

 

Then see how many hours it will take , Let's draw a horizontal line

according to C D A B