Report Updates Compliance 5 - Specific System across similar machines

Question

I wrote a roll up summary of Compliance 5 to summarize missing/installed on a group of machines.  I never noticed it before, but the number of installed patches varies greatly across similar OS's, including some built on the same day and having just
baseline software installed.  Has anyone else noticed this and possibly know why this happens? 
Here is the main query I'm using:
SELECT
CS.Name0 AS System,
CS.UserName0 AS 'User',
SUM(CASE WHEN UCS.Status = 2 THEN 1 ELSE 0 END)
AS Missing,
SUM(CASE WHEN UCS.Status = 3 THEN 1 ELSE 0 END)
AS Installed,
ROUND(
(SUM(CONVERT(float,
CASE WHEN UCS.Status = 3 THEN 1 ELSE 0 END))
/ (SUM(CONVERT(float,
CASE WHEN UCS.Status = 2 THEN 1 ELSE 0 END))
+ SUM(CONVERT(float,
CASE WHEN UCS.Status = 3 THEN 1 ELSE 0 END))
)) * 100, 2) AS Compliance, WS.LastHWScan
FROM
v_Update_ComplianceStatus AS UCS
LEFT OUTER JOIN v_GS_COMPUTER_SYSTEM AS CS
ON CS.ResourceID = UCS.ResourceID
JOIN v_CICategories_All AS CI
ON CI.CI_ID = UCS.CI_ID
JOIN v_CategoryInfo AS NFO
ON NFO.CategoryInstance_UniqueID =
CI.CategoryInstance_UniqueID
AND
NFO.CategoryTypeName = 'UpdateClassification'
LEFT JOIN v_GS_WORKSTATION_STATUS AS WS
ON WS.ResourceID = CS.ResourceID
LEFT JOIN v_FullCollectionMembership AS FCM
ON FCM.ResourceID = CS.ResourceID
WHERE (UCS.Status IN (2, 3))
AND (CS.Name0 LIKE '<SomeServer>%')
AND FCM.CollectionID = '<SomeCollectionID>'
AND NFO.CategoryInstanceName = 'Critical Updates'
GROUP BY
CS.Name0,
CS.UserName0,
WS.LastHWScan
There is also a screenshot at sccmbrokeit.blogspot.com/2013/11/improved-sccm-2012-srss-microsoft.html.  You can see in the last screenshot (this only show 'critical updates') that then number installed varies from 6 to 27, but there are several that
have either 6 or 18 installed that were installed at roughly the same time with the same application loads.  I see the same pattern on DC's as well which have strict build proceedures and were last refreshed within a few days of each other. 
For the life of me I just can't see any differences on the machine that would cause different reporting.  Thanks all,
--Dave

Answer 1

Hi,
Have you compared two similar computers’ logs when you deploy same updates? (UpdatesHandler.log, UpdatesStore.log, UpdatesDeployment.log)
Best Regards,
Joyce Li
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