如何修改Team Foundation Server报告以排除周末?

我想修改TeamFoundationServer内置的MS Agile模板报告以排除周末。

例如,以下是剩余工作报告的dsWorkItemHistory数据集:

WITH
MEMBER [Measures].[Date Key] AS
    [Date].[Date].CurrentMember.UniqueName

SELECT
  {
    [Measures].[Date Key],
    [Measures].[Cumulative Count]
  } ON COLUMNS,
  (
    [Work Item].[System_State].[System_State],
    (StrToMember(@StartDateParam):StrToMember(@EndDateParam))
  )
  ON ROWS
FROM [Team System]
WHERE
(
  STRTOMEMBER("[Team Project].[Team Project].["+@Project+"]"),
  STRTOSET(@IterationParam),
  STRTOSET(@AreaParam),
  STRTOSET(@WorkItemTypeParam)
)

我对MDX完全不熟悉。任何关于定制返回数据以排除周末的指示都是值得赞赏的。