University of Adelaide · FACULTY OF COMPUTER SCIENCE

INFO 2004 Chap.3 Cloud Economics: CapEx, OpEx and Cost Control

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Chapter 3 of 14 · INFO 2004

Cloud Economics: CapEx, OpEx and Cost Control

Cloud economics begins with business drivers and the shift in how technology spending is structured. The source defines capital expenditure as funds used to acquire, upgrade and maintain physical assets, and operating expenditure as expenses incurred through normal business operations. That distinction supports the course's CapEx-to-OpEx migration framing.

Total Cost of Ownership widens the view beyond a headline price by asking what the environment costs across acquisition, operation and support. The practical layer then turns estimation into control: pricing tools, a budget, monitoring spend and deciding when paid support is warranted.

This is a deliberately thin source area, so the chapter teaches a decision procedure rather than inventing provider prices, support entitlements or calculator outputs. Every estimate should disclose workload assumptions and be treated as revisable evidence rather than a promise.

In this chapter

What this chapter covers

  • 01

    Business drivers for cloud adoption

  • 02

    CapEx as acquisition and maintenance of physical assets

  • 03

    OpEx as normal operating expense

  • 04

    The CapEx-to-OpEx shift

  • 05

    Total Cost of Ownership as a comparison frame

  • 06

    Pricing calculators and explicit assumptions

  • 07

    Budgets, spend monitoring and paid support

Worked example · free

Build a defensible cost comparison without invented prices

Q [4 marks]. AskSia-authored practice weighting. A manager says cloud must be cheaper because no server purchase appears in the proposal. Show how to turn that claim into a decision without adding unstated provider rates.
  • 1Classify the server purchase as CapEx using the source definition; classify recurring operating charges as OpEx.
  • 1List comparable TCO categories for both options instead of comparing purchase price with one recurring line.
  • 1State workload assumptions—usage pattern, growth, operational effort and support need—without inserting unsupported prices.
  • 1Recommend calculator, budget and spend monitoring as an evidence loop, then revisit the estimate when assumptions change.
The absence of a server purchase changes the spending pattern but does not prove lower total cost. Compare like with like through TCO, make assumptions visible, use the provider's pricing tool, set a budget and monitor actual consumption before revising the decision.
Sia tip — A cost conclusion without an assumption list is not analysis; it is an untestable slogan.
Glossary

Key terms

Capital expenditure
Funds used to acquire, upgrade and maintain physical assets.
Operating expenditure
Expenses incurred through the normal operations of a business.
Total Cost of Ownership
A comparison frame that extends beyond purchase price to the wider cost of owning and operating an environment.
Pricing calculator
A provider tool used to estimate a proposed design from workload assumptions.
Budget
A control target used to make expected spend visible and support intervention.
Paid support
A provider support option treated here as a deliberate escalation choice, not an automatic architecture feature.
FAQ

Cloud Economics: CapEx, OpEx and Cost Control FAQ

What is the difference between CapEx and OpEx?

CapEx acquires, upgrades or maintains physical assets; OpEx is incurred through normal business operations.

Does moving to cloud guarantee lower cost?

No. The course frames an economic shift and TCO comparison, not a universal saving.

Can I quote a provider price in this chapter?

Only when the course materials state it. This guide instead teaches assumption-led comparison and calculator use.

Why monitor spend after estimating it?

The estimate is based on assumptions; monitoring supplies actual consumption evidence so the budget and design can be reviewed.

Study strategy

Assessment move

Practise classifying spending stories before doing any recommendation. Then build a two-column TCO frame whose rows are comparable across the current and proposed environments. Finish every response with the control loop: estimate, budget, monitor, investigate variance, revise. This gives the thin cost-tool material analytical depth without introducing unstated service prices or entitlements.

Working through Cloud Economics: CapEx, OpEx and Cost Control in INFO 2004? Sia is AskSia’s AI Computer Science tutor — ask any INFO 2004 Cloud Economics: CapEx, OpEx and Cost Control question and get a clear, step-by-step explanation grounded in how INFO 2004 is taught and assessed. Read this chapter free, then take your hardest questions to Sia.

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