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PRODUCT DEVELOPMENT

From Idea to MVP in 90 Days

Our process for rapidly validating and building minimum viable products. How we go from initial concept to a launched product serving real customers in under three months.

T Tim Mushen 8 min read December 1, 2025

The 90-Day Framework

Building a product in 90 days sounds aggressive, but it's entirely achievable when you have a disciplined process. The key isn't moving faster—it's eliminating everything that doesn't matter and focusing ruthlessly on what does.

Here's how we structure our 90-day sprints:

Phase 1: Weeks 1-3 — Discovery & Validation

The first three weeks are about ensuring we're building something people actually want. This is where most products fail, so we invest heavily here.

Week 1: Problem Definition

We start by deeply understanding the problem we're solving. This means:

  • Interviewing 10-15 potential users
  • Mapping the current solutions they use
  • Identifying the specific pain points and frustrations
  • Quantifying the impact of these problems

The goal isn't to validate our idea—it's to invalidate our assumptions as quickly as possible.

Weeks 2-3: Solution Sketching

Once we understand the problem deeply, we sketch potential solutions. Notice I said "sketch," not "design." We're creating rough concepts to test, not polished mockups.

We share these sketches with potential users and gather feedback. Often, what we thought was the obvious solution turns out to be wrong. Better to learn this now than after building.

Phase 2: Weeks 4-8 — Build

With validation complete, we shift into build mode. This is where the actual product takes shape.

Weeks 4-5: Core Architecture

We establish the technical foundation:

  • Set up the development environment
  • Build core data models
  • Create essential API endpoints
  • Implement authentication

We prioritize boring technology over cutting-edge tools. Reliability beats novelty when you're moving fast.

Weeks 6-8: Feature Development

We build features in order of importance, not complexity. Each feature follows a simple process:

  1. Build the minimal version
  2. Deploy to staging
  3. Test with real users
  4. Iterate based on feedback

We ship daily. Small, frequent deployments reduce risk and accelerate learning.

Phase 3: Weeks 9-12 — Polish & Launch

The final phase transforms our functional prototype into a launchable product.

Weeks 9-10: Refinement

This is where we address:

  • UI/UX polish based on user testing
  • Performance optimization
  • Edge cases and error handling
  • Mobile responsiveness

Week 11: Pre-Launch

We prepare for launch:

  • Set up monitoring and analytics
  • Create initial marketing materials
  • Build landing pages
  • Prepare customer support systems

Week 12: Launch

Launch day is anticlimactic by design. We've been testing with real users for weeks, so the official launch is just opening the doors wider.

What Makes This Work

Ruthless Prioritization

The 90-day constraint forces hard decisions. When you can only build a few things, you focus on what matters most.

Constant User Contact

We never go more than a few days without talking to users. This keeps us grounded and prevents us from building features nobody wants.

Small, Autonomous Team

Our build teams are 2-4 people maximum. Small teams move faster because they spend less time coordinating and more time building.

Accept Imperfection

The MVP will have rough edges. That's okay. We're testing whether the core concept works, not whether we can build a polished product.

Common Mistakes to Avoid

Over-scoping the MVP: The "minimum" in MVP is there for a reason. If your MVP takes six months, it's not minimum.

Premature optimization: Don't worry about scaling until you have users. Most products fail because nobody wants them, not because they can't scale.

Skipping validation: No amount of good engineering can save a product that solves the wrong problem.

The Result

By week 12, we have a live product serving real customers. More importantly, we have validated learning about what works and what doesn't. This positions us to iterate intelligently rather than guess blindly.

The 90-day MVP isn't the end—it's the beginning of building something great.