执行CK44，会删除如下数据：
If you _deletea costing run, the data for
Selection is deleted，Structure explosion is deleted，Cost estimate is not deleted，Marking is not
deleted，Release is not deleted。
The administrative data for the costing run
(name, description, selection and
structure explosion) is deleted. The material cost estimates themselves are not
deleted. You have to _deletethem in a second step CKR1.
执行CKR1，会删除如下数据：
When you _deletea material cost estimate,
the following data is deleted:
Basic costing data
Cost component split
Itemization
Log
In test run mode, a list appears showing
the cost estimates that can be deleted.
In the reorganization mode, the system
issues a message detailing the number of
cost estimates deleted.
也就是说，CK44只是能删除costing
run的一些管理数据，包括筛选和结构展开，即CK40N的前两个步骤可使用CK44删除；对于costing run的结果（mark、realease）是没法删除的，如果要删除，必须用CKR1，即CK40N的后三个步骤需要CKR1删除。

原文链接：https://zhuanlan.zhihu.com/p/31026872