最常用的存货量控制包括：
参考答案：
①再订货点（ROL）：是指决定再次订货时现有存货的持有水平。
公式：再订货点=今存货的最高耗用量X收到订货的最大间隔时间
最大间隔时间是指从发出订单至收到订货之间的时间间隔。
②最低（缓冲）持有量：是指为避免缺货允许存货持有的最低水平。
公式：最低持有量=再订货点-（平均耗用量X平均间隔时间）
③最高持有量：是指存货持有量达到了造成企业资源潜在浪费的水平.它与企业储备能力的增加有关，会导致额外成本的增加。
最高持有量=再订货点+再订货量-（最低耗用量X最低间隔时间）
④再订货量：是指企业达到再订货点时需要采购的存货量。在一个简单的存货控制系统中，它是最高持有量与最低持有量之间的差.
公式：再订货量=最高持有量-最低持有量
⑤平均存货量：是指企业在多数时间内持有的存货量.
公式：平均存货量=缓冲持有量+1/2再订货量
完形填空 先通读下面的短文，掌握其大意，然后从下面四个答案中选择可以填入相应空白处的最佳答案。（本大题共10分，每小题1分） Do you have many friends in this busy and noisy world? I think you can give me your answer without thinking for a minute. Friendship is so 1 that no one can live if he has no friends. One is happy to have a good friend to talk, laugh, and do some other things with. Everyone will feel 2 if he has no friends. Maybe you will say that sometimes friends quarrel (争吵)with each other, but it doesn't matter. That doesn't mean they no longer 3 each other. They will make up and become 4 again. If our friends go to another place, we will feel very sad. We 5 them very much, but we can 6 them or write to them. Maybe we will never see them 7 . And we can make new friends. It is surprising to find out 8 we like new friends when we get to know them. There is more good news for people who have friends. They live longer than people who have no friends or have few friends. Why? Perhaps because they are 9 . Being happy helps you keep healthy. If you know someone cares about you, you 10 take better care of yourself. Do you think so?
|