Designing CMDB and Identification Decisions
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In this lesson, you will learn:
- Which CMDB decisions a Discovery design needs
- How readiness findings drive them
- SNWR’s decisions DD-D05 and DD-D06
🔁 Quick look back: Last time: Designing Schedules and Scan Windows. You learned how SNWR chose when each part of the network is scanned.
1 The Problem: CMDB Choices Were Still Open
The CMDB readiness review left two open questions:
- Who owns which fields on server CIs?
- Does the SNWR Mail Archiver need its own class?
👉 The fix: Decide them now, in writing, before any configuration.
2 The decisions to make
- Which classes are in scope.
- Whether any new class is needed.
- Which identification rules apply.
- Which source owns which fields.
💡 Good to know: Prefer baseline classes and rules. Every custom one is something the client must maintain.
3 How findings drive them
| Readiness finding | Decision |
|---|---|
| Import still writing to CIs | Switch it off; lowest priority until then |
| People set support groups | People own those fields |
| In-house archiver | New class with its own rule |
4 Project Clear View: How We Implemented It
📍 Situation: Two CMDB topics came from the readiness review.
🧭 Decision: Decide both and record them as DD-D05 and DD-D06.
🛠️ Steps we took:
- Turned the field ownership table into DD-D05.
- Checked that no existing class fits the archiver well.
- Wrote DD-D06: a new class under Application, with its own identification rule.
- Kept baseline rules for everything else.
✅ What we verified:
- Hana approved both decisions.
- Riya agreed to maintain one custom class.
📁 Evidence: DD-D05 and DD-D06 in the design document.
5 Quick recap
- Design decides classes, identification and field ownership.
- Readiness findings drive the decisions.
- Prefer baseline classes and rules.
- SNWR adds only one class: the SNWR Mail Archiver.
6 Check yourself
Think of your answer first. Then tap to check.
1 What does DD-D05 decide? Show answer
Which source owns which fields on server CIs.
2 Why prefer baseline classes? Show answer
Custom classes are extra work for the client to maintain.
3 What new class does SNWR create? Show answer
SNWR Mail Archiver, under Application.
Nice work! SNWR’s CMDB decisions are made. 🎉
Next up: Planning Environments: Dev, Test and Production
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