Over 14 years of ServiceNow consulting across more than 10 companies, I've observed that nearly every organization struggles with technical debt — and it worsens as more business domains (ITSM, ITOM, SPM, HRSD, ITAM, etc.) are implemented on the platform.

Technical debt accumulates when short-term, quick-fix solutions are implemented without regard for long-term maintainability, upgradeability, performance, or supportability. It typically stems from customizations that bypass native platform features rather than leveraging built-in capabilities.

 

Key contributing factors include:

• Over-customization — Excessive modification of out-of-the-box (OOTB) functionality instead of using platform-native configurations.
• Scripting overuse — Heavy reliance on client/server scripts duplicating existing OOB functionality.
• Baseline modifications — Directly altering baseline objects, increasing upgrade complexity and risk.
• Custom structures — Building custom tables/workflows when standard ones suffice, plus orphaned workflows left after Flow Designer migrations.
• Poor configuration hygiene — Hard-coding values instead of System Properties, and inconsistent Update Set practices.
• Governance gaps — Unscoped/poorly scoped applications, excessive ACL overrides, inconsistent naming/coding standards.
• Architectural issues — Poor CMDB design and unnecessary/duplicate integrations adding complexity without clear value.
• Documentation deficits — Undocumented configurations complicating future maintenance.
• Deferred upgrades — Skipping upgrades, causing instances to drift further from OOB baselines.

I would like to share my over 14 years ServiceNow implemetation experience with the following objectives:

 

1. Proactive approach to eliminate the tichnical debt
2. Active approach to eliminate the tichnical debt
3. Summary

Proactive approach to eliminate the tichnical debt

Within over 10 companies I worked, I found most  samll to middle size compaies (50 - 5000) doesn't have any proactive processes to review ServiceNow changes to the platform so their tichinal debt is accumulating very fast than their expectation.  

 

 A strong ServiceNow proactive change guideline should prevent technical debt before a change reaches development, rather than trying to clean it up during upgrades. The following are best practice how to proactivly eliminating Tichnical debt.

 

I would establish the following 7-step governance model:

• Establish Strong Platform Governance
  Implement a formal governance and intake process requiring business justification, architecture review, and approval before any customization or major platform change.
• Adopt an OOTB-First Strategy
  Always evaluate Out-of-the-Box (OOTB) functionality and configuration first, following the hierarchy: OOTB → Configuration → Extension → Customization → New Application.
• Enforce Architecture & Development Standards
  Require solution design reviews, scoped applications, coding standards, peer reviews, and strict controls against modifying ServiceNow baseline tables and functionality.
• Strengthen Change, Release & Testing Controls
  Use disciplined Update Sets, automated code scanning, and Automated Test Framework (ATF) regression testing before production deployment.
• Proactively Identify & Control Technical Deb t
  Assess every change for upgrade impact, performance, security, complexity, maintainability, licensing, and supportability, while maintaining a Technical Debt Register and measurable KPIs.
• Implement Continuous Monitoring & Upgrade Readiness
  Perform regular Instance Scans/Health Scans, monitor configuration drift and deprecated functionality, and continuously prepare the platform for ServiceNow upgrades.
• Document, Own & Continuously Reduce Customizations
  Maintain a comprehensive customization register with business value, owner, purpose, dependencies, and review dates. During each upgrade, evaluate customizations and retain, merge, or revert them to OOTB where appropriate.

 

Key Principle

Treat every customization as a potential liability. Require teams to demonstrate why it should be built , not why it should not be built. This shifts the culture from “Can we build it?” to “Should we build it?”

Governance Rule:

No change without business value; no customization without architectural justification; no technical debt without an owner and remediation plan.

The goal is to establish proactive ServiceNow Platform Governance that prevents technical debt at the point of change, rather than identifying and fixing it later during upgrades.

 

Active approach to eliminate existing tichnical debt

I started using the ServiceNow platform with the Aspen release (Q4 2011). Over the years, I learned that ServiceNow is a highly flexible platform on which you can implement almost any business requirement.

In the early years, however, there were no clear or strongly enforced best-practice guidelines from ServiceNow. In fact, even some ServiceNow-provided scripts did not always follow best practices—for example, using GlideRecord to retrieve large data sets from client-side scripts instead of processing the data on the server side.

As ServiceNow continued to expand into various business domains, such as HRSD, SPM, CRM, SecOps, and ITOM, its best-practice guidelines became more mature, comprehensive, and strictly enforced.

 

6 Key Points for Eliminating ServiceNow Technical Debt

1. Discover and Baseline Technical Debt
   Perform a comprehensive inventory of customizations, scripts, workflows, integrations, custom tables/fields, ACLs, CMDB/CSDM deviations, and skipped upgrade records using Instance Scan, Health Scan, Upgrade History, Customer Updates, and code analysis.
2. Classify and Prioritize by Risk and Business Value
   Classify each customization as Retire, Revert to OOTB, Refactor, Retain, Merge/Re-engineer, or Move to a Scoped Application. Prioritize security, performance, upgrade blockers, data/CMDB issues, and critical platform customizations first.
3. Revert to OOTB Whenever Possible
   Adopt an OOTB-first approach by replacing custom workflows, scripts, approvals, and integrations with current ServiceNow capabilities such as Flow Designer, native functionality, and IntegrationHub whenever they can meet the business requirement.
4. Refactor and Re-architect Necessary Customizations
   For customizations that must remain, simplify and optimize the design: consolidate Business Rules, eliminate unnecessary scripts and fields, replace legacy Workflows, reduce synchronous processing, improve integrations, and move appropriate functionality into scoped applications.
5. Test, Validate, and Measure the Results
   Use ATF and regression testing throughout the remediation process and validate functionality, integrations, performance, security, CMDB/data integrity, and upgrade compatibility through Development → Test → UAT → Production. Run Instance Scan/Health Scan again to measure improvement.
6. Establish Continuous Technical-Debt Governance
   Create a Technical Debt Register/Backlog with an owner, risk, priority, remediation plan, target release, and status. Review technical debt quarterly and make debt reduction part of every ServiceNow upgrade cycle, with the goal that technical debt removed is greater than technical debt introduced.

Key Principle

Treat technical-debt remediation as a continuous, incremental process tied to every ServiceNow upgrade—not as a one-time cleanup.

 

Approach:

Discover → Assess → Classify → Prioritize → Retire → Revert → Refactor → Test → Validate → Monitor

 

Architectural Principle:

“Don’t just fix technical debt—reduce it by returning to OOTB functionality wherever business requirements allow.”

This keeps the ServiceNow platform simpler, more upgradeable, easier to support, and less costly to maintain.

 

Summary

Eliminating technical debt is critical to maintaining a stable, secure, scalable, upgradeable, and cost-effective ServiceNow platform. Excessive customization, modified baseline objects, deprecated APIs, inefficient scripts, custom workflows, and redundant integrations increase maintenance complexity, create upgrade conflicts, and can degrade platform performance and user experience. As organizations expand ServiceNow across ITSM, ITOM, SPM, HRSD, and ITAM, unmanaged technical debt compounds, making the platform harder to support and slowing adoption of new capabilities.

Reducing technical debt protects the organization’s ServiceNow investment and ROI by simplifying the platform, lowering support and maintenance costs, improving upgrade readiness, and enabling faster innovation. The objective is not simply to eliminate customization, but to continuously identify, assess, classify, prioritize, retire, revert to OOTB, refactor, test, validate, and monitor technical debt.

 

Key principle: Reduce customization, maximize OOTB functionality, and continuously pay down technical debt as part of every ServiceNow upgrade and release cycle.