案例：校园婚礼
学号：xxxxxxx
姓名：xxxxxx
分析简化问题
1. 预订教堂和婚礼（1天）
2. 发布公告（17天------10天，多付100美元）（2要在1之后才能进行）
3. 装饰教堂（3天）
4. 伴娘赶到（10天-------2天 ，多付500美元）
5. 挑选桌布和蛋糕（2天）
6. 选礼服样式（3天）
7. 订购和受到礼服样式.带子（8天-------5天，多付25美元）
8. 礼服制作（11天--------6天，多付120美元/天）
9. 试礼服（2天）
10. 洗熨礼服（2天--------1天，多付30美元）
11. 确定邀请样式（3天）
12. 订做邀请函（12天--------5天，多付35美元）
13. 列出要邀请的客人名单（4天）
14. 写地址（12天--------4天，多付25美元/天）
15. 邮寄信封（1天）
整理分析：
1.发出公告要在预订教堂之前，既2要在1之后，装饰教堂要在2和1之后；
2.提前十天预订酒店，挑选桌布要在预订酒店之后；
3礼服料子要在礼服样式之后，礼服料子要在礼服样式之后，烫熨礼服要在试过和新娘来过之后；
4先确定邀请函样式，然后在进行定做邀请函和列出客人名单；写地址必须在邀请函定做好之后，邮寄信封必须在写地址之前；邀请函必须在婚礼十天之前发出去。
各工序明细表
绘制网络图：
图.婚礼计划网络图
此网络的关键线路是图中粗箭线
关键路线为N K L M
为按时完成婚礼计划，以下花费是此方案的必须支出：B发布公告100，E做邀请函35美元，J定礼服料子、带子25美元，K制礼服720美元，L洗熨30美元。
经计算，为满足4月22日举行婚礼，我们此方案的最小成本计划是910美元。
第二篇：案例1校园婚礼
CASE1
The Campus Wedding
●●On March 31of last year, Mary Jackson burst into the family living room and announced that she and Larry Adams(her college boyfriend)were going to be married. After recovering from the shock, her mother hugged her and asked, ‘whenever? ‘ The following conversation resulted: Mary: April 22.
Mother: What!
Father: The Adams-Jackson Wedding will be the social hit of the year round. Why so
sooner?
Mary: Because on April 22 the cherry blossom on campus are always in full blooming! The
wedding picture will be beautiful.
Mothers: But honey, we can not possibly finish all the things that need to be done by then.
Remember all the details that were involved in your sister’s wedding? Even if we
start tomorrow, it takes a day to reserve the church and reception hall, and they need
at last 17 day’s notice. That has to be done before we can start decorating the church,
which takes three days. An extra ＄100 contribution on Sunday would probably cut
that 17-day notice to 10 days, thought.
Father: Ugh!
Mary: I want Jane Summers to be my maid of honour.
Father: But she’s in the Peace Corps, in Guatemala, isn’t she? It would take her 10 days to
get read and drive up here.
Marry: But we could fly her up in two days. And it would cost only ＄500. She would have
to be here in time to have her dress fitted.
Father: Ugh!
Mother: And catering! It takes two days to choose the cake and table decorations, and Jack’s
Catering wants at least 10 days’ notice prior to the rehearsal dinner (the night before
the wedding).
Marry: Can I wear your wedding dress, Mom?
Mother: Well, we’d have to replace some lace, but you could wear it, yes. We could order the
lace from New York when we order the material for the bridesmaids’ dress. It takes
eight days to order and receive the material. The pattern needs to be chosen first, and
that would take three days.
Father: We could get the material here in five days if we paid an extra ＄25 to airfreight it. Marry: I want Mrs. Watson to work in the dress.
Father: But she charges ＄120 a day!
Mother: If we did all the sewing, we could finish the dress in 11 days. If Mrs. Watson helped,
we could cut that down to six days, at a cost of ＄120 for each day less than 11days.
Marry: I don’t want anyone but her.
Mother: It would take another two days to do the final fitting. It normally takes two days to
clean and press the dress, but that new cleaner downtown could do them in one day if
we pay the ＄30 charge for express serviceable.
Father: Everything should be completed by rehearsal night, and that’s only 21 days from now.
I bet that will be a busy day.
Mother: We’ve forgotten something. The invitations.
Father: We should order the invitations from Bob’s Printing Shop, and that usually takes 12
days. I will bet he would do it in five days if we slipped him an extra ＄35.
Mother: It would take us three days to choose the invitation style before we could order them,
and we want envelopes printed with our return address.
Marry: Oh! That will be elegant.
Mother: The invitation should go out at least 10 days before the wedding. If we let them go any
later , some of the relatives would get theirs too late to came, and that would make them mad. I’ll bet that if we didn’t get them out until eight days before the wedding, Aunt Ethel couldn’t make it, and she would reduce her wedding gift by ＄200.
Father: Ugh!
Mother: We’ll have to take them to the post office to mail them, and that take a day. Addressing
would take four days unless we hired some part-time help, and we can’t start until the printer is finished. If we hired someone, we could probably save two days by spending ＄25 for each day saved.
Mary: We need to get gifts to give to the bridesmaids at the rehearsal dinner. I can spend a day
and do that.
Mother: Before we can even start to write out those invitations, we need a guest list. Heavens,
that will take four days to get in order, and only I can understand our address file.
Mary: Oh, Mother, I’m so excited. We can start each of the relatives on a different job.
Mother: Honey, I don’t see how we can do it. Why , we’ve got to choose the invitations and
patterns and reserve the church and…
Father: Why don’t you just take＄1500 and elope. You sister’s wedding cost me ＄1200, and
she didn’t have to fly people up from Guatemala, hire extra people, use airfreight, or anything like that.
Questions
1. Given the activities and precedence relationships described in the case, develop a network diagram for the wedding plans.
2. Identify the paths. Which are critical?
3. What is the minimum-cost plan that meets the April 22 date?