Software Development Lifecycle: Stages from Idea to Release

What the stages are

The Software Development Lifecycle (SDLC) is the path a product takes from idea to a working service. In most projects it looks like this:

1. Discovery — research and planning.
2. Design — prototypes and interfaces.
3. Development — writing the code.
4. Testing — quality checks.
5. Release — launch for users.
6. Support — maintenance and growth.

Stages can run one after another (the waterfall model) or repeat in short cycles (Agile). Their content stays the same either way.

1. Discovery

The team digs into the business problem: who the users are, what their pain points are, what already exists on the market, and what the time and budget constraints look like.

What you get: a description of goals, a prioritized feature list, a user flow map, a preliminary architecture and an estimate of time and cost.

2. Design

First come wireframes — screen layouts without visual styling. Then the final UI design and a clickable prototype.

What you get: mockups of all key screens, a prototype you can "walk through", and a UI kit — a set of components for development.

3. Development

Developers build the frontend and backend, set up the database and integrations. In Agile, work is split into sprints — short iterations, each ending with a demo of the result.

What you get: working parts of the product on a staging server, regular demos and access to the task tracker.

4. Testing

QA engineers verify that everything works according to requirements: features, different devices and browsers, load and security. Some checks are automated.

What you get: reports on bugs found and fixed, and a stable version ready for acceptance.

5. Release

The product is deployed to production servers, published to the App Store and Google Play, and connected to a domain, analytics and monitoring.

What you get: a working product for real users, access to all services and documentation.

6. Support and growth

After launch come user feedback, new ideas and the inevitable minor bugs. Dependencies need updates, servers need watching and features need adding.

What you get: stable operation, fixes and a development plan based on real data.

Your role at each stage

Common mistakes

• Skipping discovery. Misunderstanding the task costs the most to fix later.
• Cutting testing to hit a deadline. Then users find the bugs instead of the team.
• Not planning for support. A product without maintenance degrades over time.
• Not taking ownership of access. Code, domains and accounts should belong to you.