IT Terms You Need When Ordering System Development: A Manager's Minimum Guide

Not understanding IT terminology means moving through meetings and contracts with a development vendor without ever confirming what words like "requirements definition," "person-month," or "SLA" actually mean. This is especially common at small and midsize businesses with no dedicated IT staff, or just one person wearing that hat, and left unaddressed it can lead to misunderstandings and unexpected cost overruns later on. This article organizes the terms that commonly come up in vendor meetings by scene, so owners and part-time IT staff can grasp the essentials.

For a development vendor's staff, words like "requirements definition" and "API" are everyday vocabulary; for the ordering business owner, they are unfamiliar jargon. Explanations often proceed in technical terms with no ill intent, and owners hesitate to ask because it feels awkward to question something "basic" at this point. But system development contracts involve significant sums, and a mismatch in understanding tends to get expensive later. Asking about a term's meaning every time it comes up should be seen as risk management, not embarrassment.

"Person-month" in particular shows up constantly as the basis for quoted amounts. For more on how to read a quote and what a person-month really represents, see How to Read a Development Quote and What Is a Person-Month?. Which contract type — work contract or quasi-delegation — fits your project depends on how firm the specifications are, so it's worth aligning on this with the vendor before signing.

Choosing between the cloud and owning your own server is really a decision about cost structure — whether you prioritize lower upfront spending or lower recurring fees. Cloud setups generally keep upfront costs lower than owning your own server, but actual figures vary widely by project, so it's worth confirming with quotes from multiple vendors. None of these terms need to be mastered in full; it's enough to ask how each one affects your business specifically.

Maintenance and SLA terms govern a relationship that continues long after development ends, so they can affect your total spend even more than the initial build cost. For a fuller breakdown of maintenance scope and pricing, see the Complete Guide to Maintenance before you sign.

When an unfamiliar term comes up in a meeting, it's fine to ask on the spot what it means for your business. Pretending to understand and moving forward often leads to "this isn't what I expected" disputes after the contract is signed. As covered in Preventing Extra-Cost Disputes, catching a misunderstanding early costs far less than fixing it downstream.

- Ask: "Does this affect our cost, timeline, or features?"
- Ask: "Can you explain that in one plain sentence, without jargon?"
- Ask: "What do other companies call this?" to map the term to something familiar
- Have the explanation recorded in meeting notes or email so you can refer back to it

Whether a vendor can translate jargon into language you understand is itself a useful signal for evaluating them. A vendor who just repeats technical terms without breaking them down is likely to cause the same kind of friction after the contract starts. There are several other points worth confirming before you sign, so it pays to lay them all out ahead of time.

The IT terms that come up when ordering system development fall roughly into three scenes: contracts, architecture, and operations. You don't need to memorize all of them — just keep asking how each one affects your cost, timeline, and business risk. Speaking up when a term is unclear not only improves your own decisions, it also helps you spot which vendors are worth trusting.