所有的设计更改应做出标识和记录，用“设计更改通知单”及时传递给有关部门和人员。
All design changes should be marked and recorded, and should be transmitted to relative sectors and personnel in time in the form of notification of design changes.
Observer设计模式可以把更改通知给对此感兴趣的对象。
The Observer design pattern allows interested parties to be notified of changes.
应理解成本分析对设计的影响，任何更改都应通知成本分析员。
Should understand the impact of design on cost and inform Cost Analyst of any proposed changes.
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