How to plan a web project

From idea to launch: phases, decisions and mistakes you should avoid

9 min

Most web projects that fail don’t fail in execution, but in planning. Poorly defined requirements, misaligned expectations between business and development, impossible timelines and rushed technology decisions are the most common causes of cost overruns, delays and unsatisfactory results.

Planning a web project properly means going through a series of phases before writing the first line of code: discovery, requirements definition, technology selection, realistic estimation and launch strategy. This guide details each phase with practical criteria.

Discovery phase

The discovery phase is where you understand the problem the project must solve. It’s not about listing features, but about understanding the business context, target users, competition and success indicators.

A well-executed discovery drastically reduces scope changes during development. It should involve stakeholders from business, design and technology, and produce a clear brief that aligns all participants.

  • What business problem does the project solve? How is success measured?
  • Who are the primary users? What do they need to accomplish?
  • What does the competition do? What works and what can be improved?
  • Are there existing systems that need to be integrated or replaced?

Requirements definition

Requirements should be documented with enough detail for development to estimate and design to prototype, but without specifying implementation. Separate functional requirements (what the system does) from non-functional ones (how it should behave: performance, security, scalability).

Prioritise with a framework like MoSCoW (Must, Should, Could, Won’t) to distinguish launch essentials from what can wait for later phases. A well-defined MVP is more valuable than an ambitious project that never ships.

  • Functional requirements: specific capabilities the system must offer
  • Non-functional requirements: performance, security, accessibility, SEO, scalability
  • Content requirements: volume, structure, who produces it, editorial workflow
  • Integrations: CRM, ERP, payment gateways, analytics, third-party services

Technology selection

Technology should be selected after defining requirements, not before. Choosing a framework or CMS before understanding what the project needs inverts the process and limits your options.

Evaluate at least three alternatives against a weighted criteria matrix: performance, scalability, total cost, team capabilities, ecosystem and community. If possible, validate the chosen option with a proof of concept before committing the full budget.

Team and necessary roles

A professional web project needs clear roles: product owner (defines the what), UX/UI designer (defines how it looks and feels), frontend developer, backend developer, QA (ensures quality) and a project manager (coordinates and manages risk).

In smaller teams, one person can cover multiple roles, but it’s important that all are covered. The most frequent mistake is not assigning a clear product owner who prioritises and makes decisions when scope conflicts arise.

  • Product Owner: defines priorities and makes product decisions
  • UX/UI Designer: designs the experience and interface
  • Frontend Developer: implements the interface and interactivity
  • Backend Developer: builds logic, APIs and integrations
  • QA: verifies quality, accessibility and performance

Realistic timeline and budget

Estimates should include a buffer for the unexpected. A practical rule: multiply the optimistic estimate by 1.5 to get a realistic forecast. Web projects rarely deliver ahead of schedule and frequently require 20–50% more time than initially estimated.

The budget should cover all phases: discovery, design, development, testing, deployment and the first few months of post-launch maintenance. Separating the development budget from maintenance is a common mistake that leads to surprises later.

  • Discovery and design: 15–25% of total budget
  • Development: 40–55% of total budget
  • Testing and QA: 10–15% of total budget
  • Launch and first 3 months of support: 10–15% of total budget

Launch strategy

Launch is not simply putting the site into production. It requires a verification checklist (SEO, performance, accessibility, security), a redirect plan if it replaces an existing site, an intensive monitoring period and a communication plan.

Consider a soft launch with a small group of users before the public launch. This lets you detect issues in real production without impacting the entire audience. Define clear success metrics and monitor them from day one.

  • Pre-launch checklist: technical SEO, SSL, performance, forms, analytics, backups
  • Redirect plan: map old URLs to new ones with 301 redirects
  • Monitoring: error alerts, performance metrics, real-time analytics
  • Iteration plan: the first weeks post-launch are for adjusting, not relaxing

Key Takeaways

  • The discovery phase prevents costly scope changes during development
  • Requirements must be prioritised: a well-defined MVP beats an ambitious project that never ships
  • Technology is chosen after understanding requirements, not before
  • Estimates should include a buffer for the unexpected (×1.5 over the optimistic estimate)
  • Launch needs its own planning: checklist, redirects, monitoring and iteration

Planning a web project and want to get it right?

We guide you from discovery to launch, ensuring every decision is backed by data and experience.