mdx calculated measure versus measure - mdx

Question

just wondering if you could explain to me why these two mdx statements yield different results, and how I would alter the calculated measure to be correct. I am assuming the calculated measure is incorrectly using the sum function.
SELECT
{
[Measures].[PPPH]
}
ON COLUMNS,
{
[Matter].[Parent Matter Lawyer - Responsible].&[qnas]
}
ON ROWS
FROM [Expert Hypercube]
WHERE
(
[Date].[Fiscal].[Month].&[201702],
[Relative Period].[Relative Period].&[YTD]
)
versus
with
member measures.[PPPHx] as
sum({{linkmember([Timekeeper].[Person].currentmember,[Matter].[Parent Matter Lawyer - Responsible])}},measures.[PPPH])
select
{
measures.[PPPHx]
} on columns,
{
[Timekeeper].[Person].&[qnas]
} on rows
from [Expert Hypercube]
where
(
[Date].[Fiscal].[Month].&[201702],
[Relative Period].[Relative Period].&[YTD]
)

Answer 1

It's unclear why do you use Sum function at all. LinkMember function returns a member, no need to cover it with {...} like a set. Also you need to use the All member, since it returns [Timekeeper].[Person].CurrentMember + LinkMember([Timekeeper].[Person].CurrentMember,[Matter].[Parent Matter Lawyer - Responsible]).
With
Member [Measures].[PPPHx] as
(
LinkMember([Timekeeper].[Person].CurrentMember,[Matter].[Parent Matter Lawyer - Responsible]),
[Timekeeper].[Person].[All],
[Measures].[PPPH]
)
See a Richard Lees's article about it.