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Return on investment

As explained in Think Like a CTO

A financial metric comparing the value or savings generated by an initiative with the money spent on it.

Return on investment compares the value or savings generated by an initiative with the money spent on it. It asks how much the business receives for every dollar invested, although predictions can be difficult for visionary projects. section 3.6.4

Build a defensible ROI case by:

  • Converting support activity into hourly costs so recurring tickets and service demands become visible financial measures. section 2.2.1
  • Estimating direct savings from retiring legacy systems, including licenses, support contracts, hardware, hosting, and management effort. section 3.6.4
  • Seeking peer input when benefits involve new markets, increased revenue, or broader changes to business operations. section 3.6.4
  • Recognizing that management-wide agreement may sometimes justify an initiative when ROI cannot be measured reliably. section 3.6.4

A small automation with immediate ROI

A support desk found that password resets represented 60% of ticket requests. Once the hourly support cost was known, installing a password-reset mechanism became easy to justify and showed ROI in its first month. section 2.2.1

Table 2.1 Example monthly breakdown (view table figure)

Area

Monthly

AWS cost

$ 15K

DevOps (one person)

$ 2K

Software license (JIRA and GitHub)

$ 0.5K

Support (two persons at 10K each)

$ 20K

Use the monthly expenditure breakdown to identify the cost base against which an initiative’s savings or returns can be evaluated. section 2.2.1

How Think Like a CTO covers it

How deep it goes
Explains direct savings and estimation challenges, but stops short of prescribing a formal ROI calculation.
Examples
Uses password-reset automation, legacy-system replacement, call-center reductions, and monthly infrastructure expenditure categories.
What it assumes
Assumes basic expenditure and business-planning knowledge while teaching how support activity becomes financial evidence.
What you can do after
Evaluate initiatives by translating operational effort, avoided costs, and potential revenue into a business-facing justification.
How it connects
Connects ROI with budgeting, legacy systems, support costs, software licenses, hardware, management costs, and revenue growth.

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Related concepts

This explainer was generated by Manning's knowledge graph from the text of Think Like a CTO. The section links point to the parts of the book it draws on.