Strategy for Start-ups
Joshua GansErin L. ScottScott Stern
HBR, May-June, 2018
https://hbr.org/2018/05/do-entrepreneurs-need-a-strategy#strategy-for-start-ups

This is a super article that I recommend you read in its entirety (HBR reprint R1803B)

The Entrepreneurial Strategy CompassStrategic opportunities for new ventures can be categorized along two dimensions: attitude toward incumbents (collaborate or compete?) and attitude toward the innovation (build a moat or storm a hill?). This produces four distinct strategies that will guide a venture’s decisions regarding customers, technologies, identity, and competitive space

A Short Guide to Strategy for Entrepreneurs
Kevin J. Boudreau
OCTOBER 17, 2017

https://hbr.org/2017/10/a-short-guide-to-strategy-for-entrepreneurs

Very similar to our model

Strategy is hard work, and there are no magic shortcuts. What is offered here is a starting point: the most basic questions that every successful business must answer. Entrepreneurs who design their business around these questions will have a leg up when it comes to crafting strategy:

What Value Are You Intending to Create, and for Whom?Customers buy products and services because they perceive value in them. The first step toward a successful strategy is to clarify how you plan to create value, and for whom. That means defining who your customers are
How Do You Plan to Deliver That Value?In plotting your position in the market, defining how you’ll create value and for whom, you also need to define your operating model. The operating model is the set of choices and practices defining how to carry out the business. This will typically imply a set of trade-offs in trying to find a combination of activities that allows you to stake out your position — delivering certain dimensions of your solution better than the competition.
What Is Your Competitive Advantage — Your Sources of Uniqueness?The last question on the index card is perhaps the central question of strategy: Why won’t you be copied? Even if you’re delivering a great product that customers love and making money doing it, if competitors can easily enter the market and copy you, economic theory suggests they’ll drive your profits down to zero