Your company deals with manufacturing bearings for the automobile industry. You already have historical information about the errors and defects that have been identified and you would like to use this information to determine future performance. An appropriate tool which you can use is ______ .

A．scatter diagram

B．statistical sampling

C．control chart

D．trend analysis

在项目采购中经常使用询价过程，询价过程的输出不包括______。

A．合格卖方清单
B．采购工作说明书
C．采购建议书
D．采购管理计划