> For the complete documentation index, see [llms.txt](https://startup.shibin.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://startup.shibin.co/library/opportunity.md).

# Opportunity

## Problem

* [Seriously, what's your (startup's) problem?](https://medium.com/@jakemendel/seriously-whats-your-startup-s-problem-b3a884c54ab4)
* [How To Identify A Problem Worth Solving](https://productcoalition.com/how-to-identify-a-problem-worth-solving-9f542aae0cab)
* [Good problems to solve](https://bigyahu.medium.com/good-problems-to-solve-722c1a867e42)
* [What Makes A Good Startup Idea?](https://www.startuponramp.com/blog/2020/1/22/what-makes-good-startup-idea)
* [A four step guide to evaluating startup and new venture ideas](https://medium.com/neemz-innovation/evaluating-startups-and-venture-ideas-1dc419fe4d3a)
* [Startup Ideas](http://paulgraham.com/startupideas.html)
* [How to write the best problem statement for your startup](https://generalassemb.ly/blog/create-problem-statement-startup/)
* [Calculating TAM Is About Problem Size, Not Market Size](https://first-time-founder.medium.com/frequency-intensity-users-69c4fb5c3aa3)

## Customer

* [Buyer persona development using just one canvas - marketing for startups](https://digitalya.co/blog/a-different-approach-to-buyer-persona/)
* [“Who Is Going To Buy From You?” — An Illustrated Guide To Buyer’s Persona](https://divyakothari.medium.com/who-is-going-to-buy-from-you-an-illustrated-guide-to-buyers-persona-527129702c52)
* [Defining Anti-Persona's](https://brianbalfour.com/quick-takes/defining-anti-personas)
* [Startup Market Segmentation Examples & How It Can Save You $10,000’s](https://buildsuccessfulstartups.com/market-segmentation-examples/)
* [How to Interview your Customers](https://customerdevlabs.com/2013/11/05/how-i-interview-customers/)

## Market size and dynamics

* [TAM SAM SOM: What Do They Mean & How Do You Calculate Them?](https://blog.hubspot.com/marketing/tam-sam-som)
* [What Are TAM, SAM, SOM And Why Do They Matter?](https://thevcfactory.com/tam-sam-som/)
* [Why I Care About Problem Size More Than Market Size](https://hunterwalk.medium.com/why-i-care-about-problem-size-more-than-market-size-64069f1993ee)
* [Sizing Up: Market Sizing for Your Business](https://towardsdatascience.com/sizing-up-market-sizing-for-your-business-c569e45730ef)
* [Calculating TAM Is About Problem Size, Not Market Size](https://first-time-founder.medium.com/frequency-intensity-users-69c4fb5c3aa3)
* [Why ‘TAM’ doesn’t matter to me](https://techcrunch.com/2017/09/05/why-tam-doesnt-matter-to-me/?guccounter=1)
* [What VCs really means when they say “your TAM is not big enough”](https://summation.net/2019/04/20/what-vcs-really-means-when-they-say-your-tam-is-not-big-enough/)

## Competition

* [Why the Competition Doesn’t Matter for Early Stage Startups](https://medium.com/h2-ventures/why-the-competition-doesnt-matter-for-early-stage-startups-53a194b3159c)
* [Pitch Deck Pointers Part 6: The Competition Slide](https://innovationbay.medium.com/pitch-deck-pointers-part-6-the-competition-slide-d2744534c932)
* [Get Your “Competition” Slide Right](https://medium.com/swlh/get-your-competition-slide-right-2b1621eabe86)

## Timing

* [WHY NOW is a trick question](https://www.startuphacks.vc/blog/2018/08/05/why-now-is-a-tick-question)
* [The only thing that matters](https://pmarchive.com/guide_to_startups_part4.html)
* [The Formula for Luck: How to Nail the Timing of your Venture](https://www.startupgrind.com/blog/the-formula-for-luck-how-to-nail-the-timing-of-your-venture/)
* [The 4 Scenarios of Startup Timing](https://medium.com/gabor/the-4-scenarios-of-startup-timing-26bc66d4be8b)
* [Why Startup Timing is Everything](https://www.nfx.com/post/why-startup-timing-is-everything)
* [Now is the best time to be an angel investor (let me show you how)](https://calacanis.com/2020/03/27/now-is-the-best-time-to-be-an-angel-investor-let-me-show-you-how/)