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Designing Schedules and Scan Windows

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In this lesson, you will learn:

  • What a schedule design covers
  • How to choose scan times
  • SNWR’s schedules

🔁 Quick look back: Last time: Designing the Credential Strategy. You learned how SNWR designed one read-only account per technology.

1 The Problem: Scans in Business Hours Worry Everyone

If scans run during the day:

  • Users may notice slow networks.
  • Security alerts may fire during working hours.
  • Farah’s rule says 22:00 to 06:00 only.

🎯 The problem: Scans in business hours worry everyone.

👉 The fix: Plan each schedule inside approved windows, using each site’s local time.

Table of SNWR schedules and times.
Figure 1. SNWR’s schedules (DD-D04).

2 What to decide

  • What each schedule scans.
  • When it runs, in local time.
  • How long it may run.
  • Which MID Servers it uses.

3 Choosing times

  • Use the site’s local time zone.
  • Stay inside the security window.
  • Align network scans with maintenance windows.
  • Leave gaps so schedules don’t overlap on the same MID Server.

💡 Good to know: Need a refresher? See ITSM Implementation › Change Risk › Maintenance Windows and Blackout Schedules for SNWR’s maintenance windows.

4 Project Clear View: How We Implemented It

📍 Situation: Farah allows scans only from 22:00 to 06:00.

🧭 Decision: Place every schedule inside that window, by site.

🛠️ Steps we took:

  1. Listed what needs scanning and how often.
  2. Set server scans at 01:00 local time for each site.
  3. Put network scans in SNWR Sunday maintenance.
  4. Wrote DD-D04 with run limits.

✅ What we verified:

  • All schedules fit Farah’s window.
  • No two big schedules share a MID Server at the same time.

📁 Evidence: DD-D04 in the design document.

5 Quick recap

  • Plan what, when, how long and which MID Server for each schedule.
  • Use local time and stay inside the security window.
  • Align network scans with maintenance windows.
  • Avoid overlaps on the same MID Server.

6 Check yourself

Think of your answer first. Then tap to check.

1 When does SNWR Mumbai Servers Nightly run? Show answer

Daily at 01:00 IST.

2 Why run network scans in SNWR Sunday maintenance? Show answer

It’s an agreed window when network work is expected.

3 Why use each site’s local time? Show answer

So scans stay inside that site’s quiet hours.

Nice work! SNWR’s scan times are designed. 🎉
Next up: Designing CMDB and Identification Decisions

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