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From Idea to Launch: The 90-Day SaaS MVP Blueprint

A practical framework for taking your SaaS idea from concept to market-ready MVP, based on real lessons from building Shiftwell and helping other founders ship faster.

FF

FoundrFlow

November 25, 2024

15 min read

Let me be honest: when we started building Shiftwell, I thought we'd have an MVP in 90 days. Reality check? It took several months, and that was working weekends and whenever we could sync up with our developer while all of us were working full-time jobs.

But here's what I learned: the timeline isn't the problem. The approach is.

After helping dozens of founders and refining this process, I've created a framework that actually works. Not because it's faster, but because it forces you to build the right thing from day one.

The Reality Check: Why Most MVPs Fail

Most founders approach MVPs like this: "Let's build everything we think users need, but simpler."

Wrong.

An MVP isn't a smaller version of your full product. It's the smallest thing that proves your core hypothesis and gets you real user feedback.

Our Shiftwell Reality Check

We originally scoped what we thought was the "bare minimum" for Shiftwell. Even after working with our developer to strip it down, we had to cut more: shift warnings, admin panels, start day customization, CSV exports, view toggles, total hour calculations. The list went on.

Cutting those features wasn't a compromise. It was clarity.

The 90-Day Framework: Phase by Phase

Days 1-30: Validation & Core Definition

Week 1-2: Problem Validation

  • Talk to 10+ potential users about their current pain points
  • Identify the ONE core problem your MVP will solve
  • Write a one-sentence value proposition

Week 3-4: Feature Ruthlessness

  • List every feature you think you need
  • Cut 80% of them (seriously)
  • Focus on the core workflow that solves the main problem

Days 31-60: Build & Test

Week 5-6: Development Sprint Planning

  • Break remaining features into small, testable pieces
  • Set up your tech stack (keep it simple)
  • Build the core user flow first

Week 7-8: Core Feature Development

  • Build only what's needed for the primary use case
  • Test each piece as you build it
  • Don't worry about edge cases yet

Days 61-90: Polish & Launch Prep

Week 9-10: User Testing & Refinement

  • Get 5-10 users to actually use your MVP
  • Fix only the bugs that break the core experience
  • Ignore everything else

Week 11-12: Launch Preparation

  • Set up basic analytics
  • Create simple onboarding
  • Prepare your feedback collection system

The Tools That Actually Matter

You don't need a complex tech stack. You need tools that let you move fast and change direction quickly.

For Non-Technical Founders:

For Technical Teams:

"Once I had access to our codebase and AI tools like Claude and Cursor, I was able to accelerate development and fix bugs that we thought would take much longer. The bottleneck shifted from 'can we build this?' to 'should we build this?'"

The Biggest Lesson: Functionality Over Perfection

Here's the aha moment that changed everything for us: it's better to get functionality right rather than being pixel perfect.

Your users don't care if your buttons are the perfect shade of blue. They care if your product solves their problem without making them think too hard.

For Shiftwell, this meant:

How to Stay on Track

The biggest challenge isn't technical. It's psychological. Here's how to avoid the common traps:

Set Weekly Check-ins

Every Friday, ask yourself: "What did I learn about my users this week?" If the answer is "nothing," you're building in a vacuum.

Use the "Embarrassment Test"

If you're not slightly embarrassed by your MVP when you launch it, you waited too long. Ship when it works, not when it's perfect.

Track Leading Indicators

Don't just measure downloads or signups. Measure engagement with your core feature. For us, it was "How many shifts did users actually schedule?"

When You're Working Full-Time

Most founders don't have the luxury of going full-time on their startup immediately. We didn't either. Here's what worked:

The Launch Moment

Your 90-day goal isn't to build a complete product. It's to build something that proves your core hypothesis and gets you real user feedback.

Launch when you can answer these questions:

If you can say yes to all three, ship it. Everything else can be improved based on real user input.

Beyond the MVP

The 90 days don't end with launch. They end with learning. Your MVP is a learning machine, not a product.

Use the feedback to build your actual product. Some of those features you cut? You might never build them. Some problems you didn't anticipate? Those become your roadmap.

The founders who succeed aren't the ones who build the perfect MVP. They're the ones who ship fast, learn faster, and iterate until they find product-market fit.

Now stop planning and start building.

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