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Return on investment

Return on investment is a measure of the gain or benefit produced by an investment relative to its cost or the resources invested, often expressed as a ratio or percentage.

How 11 Manning books explain it

Tech Startup Toolkit

Return on investment is the gain or loss generated relative to the capital invested, usually expressed as a ratio or percentage.

How it is used
Supports an angel pitch by arguing that an investment can yield a strong multiple.
How deep it goes
Explains ROI through investment multiples, possible acquirers, comparables, and customer economics without formal financial calculation.
Examples
Uses potential 10-times or 20-times investment multiples and real-estate-style comparables for an eventual sale price.
What you can do after
Evaluate/understand how to support an investor-return claim with acquisition and customer-revenue assumptions.

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First-Party Data Activation

Return on investment is the ratio of net gain from an investment to its cost, typically expressed as a percentage.

How it is used
Frames first-party data purchasing and lakehouse modernization as measurable business investments rather than upfront technology costs.
How deep it goes
Develops revenue- and cost-based estimates, scaling scenarios, and before-and-after measures; stops short of a detailed financial model.
Examples
Uses a travel-site winback estimate, a university’s prospective CDP savings, and campaign turnaround and storage costs as measures.
What you can do after
Evaluate/understand it by estimating gains and savings, testing scaled costs, and comparing outcomes before and after implementation.

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Bayesian Optimization in Action

A return on investment measure is a ratio of profit or benefit gained from an investment to the cost of making that investment.

How it is used
Guides query selection in multifidelity Bayesian optimization by weighting information about the optimum against evaluation cost.
How deep it goes
Defines the ratio, explains its decision rules, and stops short of deriving the underlying information-gain measure.
Examples
Uses low- versus high-fidelity queries with differing costs and information gains to illustrate switching preferences.
What you can do after
Apply it via a cost-aware acquisition utility to rank multifidelity queries by information gained per unit cost.

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Data-Driven Cybersecurity

A measure of the gain or value produced relative to the resources invested.

How it is used
Connects security spending and measurable risk reduction to business decisions about the value of cybersecurity investments.
How deep it goes
Explains ROI through investment costs and estimated avoided losses, with worked comparisons rather than a general calculation method.
Examples
Uses an intrusion detection cost comparison and a healthcare executive presentation with financial, response-time, and compliance measures.
What you can do after
Evaluate/understand security investments by comparing costs with estimated avoided losses and communicating supporting measures to leaders.

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Practical Automation with PowerShell: Effective scripting from the console to the cloud

Return on investment is a measure comparing the benefit gained from an investment with its cost.

How it is used
Guides decisions about which automation work to automate fully, partially, or manually.
How deep it goes
Explains cost-versus-benefit reasoning through practical cases but provides no numeric formula.
Examples
Uses email filing, barcode scanning, and RFID implementation cost as examples.
What you can do after
Evaluate automation candidates by comparing implementation costs with time saved and productivity gained.

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Effective Platform Engineering

Return on investment is a measure comparing the value or financial return generated by an investment with its cost.

How it is used
Guides platform engineering investment, prioritization, and decisions about continuing or stopping platform work.
How deep it goes
Connects waste reduction to financial value using projected and actual measurements, without detailing a complete calculation method.
Examples
Uses a 33% time-saving scenario, a $10 million monthly income forecast, and four months of accelerated delivery.
What you can do after
Evaluate platform investments by modeling removed waste, projected income, accelerated delivery, and realized value.

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Think Like a CTO

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

How it is used
Uses ROI to justify expenditures, prioritize improvements, and frame visionary projects for business approval.
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 you can do after
Evaluate initiatives by translating operational effort, avoided costs, and potential revenue into a business-facing justification.

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The Art of AI Product Development

Return on investment is the financial or economic gain produced by an investment relative to its cost.

How it is used
Uses ROI to translate AI initiatives into financial or operational outcomes for executive decisions.
How deep it goes
Estimates value through KPIs, adoption, revenue, efficiency, and risk, but does not specify a calculation method.
Examples
Illustrates ROI through inventory optimization, client upsell projections, and healthcare-feature validation.
What you can do after
Evaluate AI opportunities and pitch them to executives with projected benefits, assumptions, and next steps.

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Financial AI in Practice

Return on investment is the ratio of gain or loss from an investment to its cost, typically expressed as a percentage.

How it is used
Translates financial AI results into a business case for budget holders and sustained deployment.
How deep it goes
Calculates net benefit against annual cost, including churn annualization and preserved-AUM revenue estimates.
Examples
Illustrates value through faster proposals, fewer AML false positives, and automated loan decisions.
What you can do after
Evaluate whether measured gains justify deployment costs and identify opportunities to improve effectiveness or reduce costs.

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Think Like a Software Engineering Manager

Return on investment is a financial performance measure comparing the benefit or return generated with the resources invested.

How it is used
Uses ROI to evaluate team and project success alongside delivery, satisfaction, collaboration, and resource-use measures.
How deep it goes
Defines ROI through resources, expected benefits, and effects, but stops short of presenting a formula or calculation method.
Examples
Uses Project Accessible, exceeding sales expectations while meeting requirements, timelines, and budget.
What you can do after
Evaluate project success by comparing resources spent with expected benefits and reviewing complementary outcome measures.

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Effective Conversational AI

Return on investment is the financial return produced by an investment relative to its cost.

How it is used
Aligns conversational AI performance with revenue generation and cost reduction.
How deep it goes
Links business goals to measurable metrics and continuous improvement, without detailing a financial ROI calculation.
Examples
Uses appointment scheduling, automated bookings, call-center deflection, and routing accuracy as measurable examples.
What you can do after
Evaluate conversational AI by connecting operational performance to quantifiable business value.

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Related concepts

These guides are generated from the text of Manning books by Manning's knowledge graph and link to the sections they draw on. The full books are available on liveBook and at manning.com.