CMDB Health Dashboard

Definitive questions

• +What are the three CMDB Health KPIs?
• +How is Correctness measured?
• +What is a Health Scorecard?
• +Where do 'required attribute' definitions come from?

Scenario drills

1. Completeness score suddenly drops 20 points

   “Overnight the Windows Server completeness KPI drops from 88% to 68%. What do you check?”

   Approach

   • New required attribute was added (or made mandatory) on the class — every existing CI now fails.
   • Discovery pattern change stopped populating a field.
   • MID Server outage caused stale last_discovered timestamps, hiding data.

   new GlideRecord('cmdb_health_result')
     .addQuery('ci_class','cmdb_ci_win_server')
     .orderByDesc('sys_created_on');

   Alternate approach

   Alternate: diff the sys_dictionary_history for that class over the last 24 hours — usually shows the config change that moved the score.

   Pitfall

   Chasing 'bad data' when the root cause is a governance change that added a new required field.