CMDB Correctness Scorecard - Duplicate denominator

Larry Youngqui2 · ‎03-07-2019

In the CI Class Manager, I have established the CI Identification Rule for independent classes and created an Inclusion Rule (Advanced) that restricts the scope to our list of "managed" classes.

The evaluation of duplicates works as expected. The "nominator" portion of the percentage is correct. But the denominator includes more than the total number of CIs in our managed list. After much searching, we can not determine where or how this number (3109429) is calculated. Our expectation is approx. 30K. Thus, our percentage is not accurate.

Any ideas on where to validate this number?

FYI: The Completeness Scorecard works exactly as we expect it to. It's just this one that is not consistent.

Thanks,

Larry

Mary Vanatta · ‎03-08-2019

Larry,

I am thinking that the CI that is counted is marked "Independent" on the Identification Rule. Servicenow Docs states "detection of independent CIs.

If you look at the CI Class Manager> Hierarchy>Hardware>Identification you can see that it is "Independent"

Whereas, if you look at the CI "Endpoint" there is no Identification rule and therefore not marked as
"Independent"

Now look at the Identification rule for "Storage Device" that Identification rule shows "Dependent" which would not be counted.

Navigate to cmdb_identifier_list.do in left nav. On the Independent tab, sort to True. The "Hardware Rule" is set to true. So any CI that uses that rule gets counted.

View solution in original post

Larry Youngqui2 · ‎03-08-2019

Thanks, Mary. That makes sense to me. Although, it's a pretty subtle and non-intuitive process (at least for me..) I very much appreciate the answer.

Now, the question becomes how to modify it and filter or remove those classes that we currently consider un-managed. I don't think I want to drop the independent rule. That would be short sighted and could cause issues if we start managing one of the classes.

We'll have to do some experimentation and see what solution we can come up with.

Thanks again!

Larry

Mary Vanatta · ‎06-12-2019

Hi Larry

Did you come up with anything on excluding the Next Hop Routing rule?

🙂 Mary