Software development methodologies: which one to choose

A software development methodology is the organized way to plan, build, and deliver a system. The two big families are Waterfall (a closed plan from start to finish) and agile ones like Scrum and Kanban (short, iterative deliveries). Choosing well isn’t about following the trend, but about matching the method to the project.

If you’re about to have software built —custom or with an in-house team— understanding this saves you surprises: the methodology defines how you’ll see progress, when you can course-correct, and how much risk you take on.

What is a development methodology?

It’s the framework that organizes the project: how it’s planned, in what order it’s built, how often something working is delivered, and how change is handled. It’s not bureaucracy; it’s the difference between “seeing progress every two weeks” and “waiting six months in the dark.”

Waterfall

The Waterfall methodology moves in sequential phases: first all the requirements are defined, then it’s designed, built, tested, and delivered. Each phase ends before the next begins.

Fits when requirements are very clear and won’t change (regulated projects, well-defined integrations).
Risk: if something was misunderstood at the start, you find out at the end, when fixing it is expensive.

Agile methodologies

Agile is an approach, not a single technique. Instead of one big closed plan, the work is split into short cycles that deliver something working and adjust with real feedback. You see progress early and can change course without redoing everything.

Scrum

Scrum organizes the work into sprints (cycles of one to four weeks). At the end of each sprint there’s a working increment and a review. It’s ideal for products that evolve and teams that need rhythm and clear priorities.

Kanban

Kanban visualizes the work on a board (to do, in progress, done) and limits how many tasks are worked at once. It’s flexible and continuous, with no fixed sprints; it works very well for maintenance and steady workflows.

How to choose the right methodology?

There’s no absolute best; there’s a best for your project:

Fixed, clear requirements, little change → Waterfall can be enough.
A product that evolves, shifting priorities → Scrum.
Continuous flow, support and maintenance → Kanban.
Most modern custom projects → an agile approach, with deliveries every two weeks.

The best methodology is the one that lets you see progress early and fix things cheaply, not the one that sounds best in a proposal.

Frequently asked questions about development methodologies

Which software development methodology is best? There’s no absolute best. It depends on the project: Waterfall for fixed requirements, Scrum for products that evolve, Kanban for continuous flows.

What’s the difference between Waterfall and Agile? Waterfall plans everything up front and delivers at the end; Agile splits the work into short cycles that deliver something working and adjust with feedback.

What is Scrum? It’s an agile methodology that organizes work into sprints (cycles of one to four weeks), each with a working increment and a review.

What methodology does a good custom team use? Almost always an agile approach with working progress every two weeks, so you see the progress and keep control.

Take the first step with the right method

Before choosing a vendor or team, be clear on:

How fixed your requirements are. The more uncertainty, the more agile.
How often you want to see progress. Demand working deliveries, not six-month promises.
How change is handled. The method should absorb it without breaking the budget.

At Normandia Web we build custom software with an agile approach: working progress every two weeks, so you see the progress, fix things in time, and the code is 100% yours.