Days 1-30: Validate and Scope
The first 30 days are about ruthless clarity. You are not building anything yet—you are proving that the opportunity is real and defining exactly what the first version of the product will do. This phase requires approximately five hours per week of the executive's time, primarily spent on customer conversations, competitive analysis, and scoping sessions with your development partner.
During weeks one and two, conduct at least 12 customer discovery conversations. These are not sales calls—they are structured interviews designed to validate three things: the severity of the pain, the willingness to pay for a solution, and the urgency of the need. Use your executive network to reach decision-makers directly. You should emerge from these conversations with a clear problem statement, a target price range, and at least three verbal commitments for pilot participation.
Weeks three and four shift to product scoping. Working with your development team—whether that is an internal resource or an external partner like Sizzle Ventures—translate the validated pain points into a feature set for the MVP. The scope should be aggressive in what it excludes. You want the smallest product that delivers the core value proposition. Define the user stories, data model, third-party integrations, and technical architecture. By day 30, you should have a signed scope document, a fixed timeline, and a clear budget.
Days 31-75: Build the MVP
The build phase is where external development partners earn their fee. For 45 days, a dedicated team translates your scope document into a working product. The executive's time commitment during this phase drops to two to three hours per week—primarily weekly demo reviews and decision-making on design and prioritization questions.
The build phase should follow a structured sprint cadence. Each week produces a demonstrable increment of functionality. Week one delivers the core data model and authentication. Weeks two and three build the primary workflow. Week four adds the secondary features. Weeks five and six handle integrations, billing, and the administrative dashboard. Week seven is dedicated to testing, bug fixes, and performance optimization. This cadence ensures visible progress and early detection of problems.
Two critical practices during the build phase: first, maintain a running list of "not now" features. You will think of 20 things to add during the build. Write them down, do not build them, and revisit the list after launch. Second, begin drafting your go-to-market materials in parallel with the build. Landing page copy, email templates for your pilot outreach, and your pricing page should all be ready before the code is complete. An MVP Sprint structured engagement handles both the development and these launch preparation elements concurrently.
Days 76-90: Launch and Learn
The final 15 days are about controlled deployment and rapid learning. This is not a public launch with press coverage and a ProductHunt campaign. This is a private beta with your pre-committed pilot customers, designed to validate the product in real-world conditions before you invest in growth.
Days 76 through 80: onboard your first three to five pilot customers. Walk each one through the product personally. Not because it does not have good UX—but because watching real users interact with your product reveals assumptions you did not know you had made. Document every point of confusion, every feature request, and every moment of delight. This qualitative data is more valuable than any analytics dashboard at this stage.
Days 81 through 90: fix the critical issues, implement the quick wins, and make the go/no-go decision on broader launch. If pilot customers are using the product regularly and providing positive feedback, you have product-market fit signals and should begin scaling your customer acquisition efforts. If usage is lukewarm, you have specific data on what needs to change before broader release. Either way, you have a working product, real market feedback, and a clear path forward—all within 90 days.
Sustaining Momentum After Day 90
The 90-day framework gets you launched, but the real work begins afterward. The transition from "launched MVP" to "growing product" requires a different cadence and a different set of decisions. How much of your time will you allocate to the side project going forward? Who handles customer support? What is your feature development velocity after the initial sprint?
Most successful executive side projects settle into a rhythm of four to six hours per week from the founder, with ongoing development handled by the same external team that built the MVP. This continuity matters—the team that built the product understands its architecture, its customers, and its constraints. Switching development teams at this stage introduces costly ramp-up time and knowledge transfer overhead.
The 90-day framework is not a rigid prescription—it is a structure that prevents the two most common failure modes: analysis paralysis (spending six months validating before building anything) and scope creep (spending $150K building a platform nobody asked for). If you have an idea and you are ready to test whether it has legs, start the conversation with Sizzle and map out your 90-day plan.
Ready to Build Your Side Project?
Executives across every industry are turning side project ideas into real products—without pulling a single engineer off their core team. The key is working with a partner who understands both the technical execution and the strategic context of building alongside a day job.
Sizzle Ventures helps executives go from idea to launched product in as little as 90 days. Our MVP Sprint is built specifically for leaders who need speed without sacrificing quality—and without touching their internal dev team.
Ready to explore what's possible? Start a conversation with Sizzle about bringing your side project to life.