各位厉害的大大们 小妹现在在美国读会计 正在学data flow diagram 但是 观念听起来简单 真的要做起题目来 好难啊~ 以下有一份问题(是英文的) 想请问有没有大大是可以解的吗 我知道感觉要花很多时间解 或是用一些concept来解释也可以! The following narrative describes Aegis Company's Billing Procedure: Each evening the shipping department at Aegis Compnay forwards, to the billing department, copy #2 of all shipping notices for goods shipped to customers that day. The next day a billing clerk starts the billing process by obtaining unit sales prices from a price list book and noting the prices on the shipping notice. He then types a three part invoices for each shipment, mails the original (copy 1) to the customer, and files copy 2 by customer name. From invoice copy 3, the clerk prepares a batch total tape, staples the tape to the batch of invoices, and sends the batch to the data processing department. In data processing, a sata control clerk first enters the invoice batch total in a control log. Then a data entry clerk keys each invoice on a key-to-tape machine. The magnetic transaction tape that is produced by the keying operation is sorted in customer account number order using a computer sort utility. At 5:00 PM each evening, the invoice transaction tape is run, together with the previous day's accounts receivable master file tape, to produce an updated master file. The update run also generates a daily summary report which is compared to the batch control log total. If the totals agree (NOTE), the report is stapled to the batch of invoices; and the package is filed by date. NOTE: Exception routines are beyond the narrative's scope. Requirements: a. Prepare a table of entities and activities b. Prepare a context diagram c. Prepare a chronologically sorted table of entities and activities. Indicate on this table the groupingbubble number and bubble titles - to be used in preparing a level 0 logical DFD. d. Prepare a logical data flow diagram (level 0 only) 我已经完成了第一项 但是碰到context diagram的部分就卡住了 卡在找不到main activity跟destination/sources的部分 我知道各位大大都很忙~PTT也不是免费的家教 只希望各位大大有兴趣的话可以解看看 然後我再来参考参考! 感谢~ -- 我也要冲人气 v(￣﹏￣)o http://www.wretch.cc/album/ispy --

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