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Check out 37 insights in total
Is the Lean Startup Methodology Dead in 2026?
As AI disrupts costs, the premise of Build-Measure-Learn has shifted. We have outlined what remains the same and what has changed, step by step.
We sell validation, and we found a sentence in our own writing that only borrowed an institution's name
We had set a rule never to use unverified figures, yet our own writing contained a sentence that merely borrowed an institution's name. This post covers what a full audit turned up and how we handled it.
When I Ran the Checker, the Checker Was Wrong First
I created a checker to ensure footnote rules were followed and recorded the results. Upon reviewing the manuscript, it turned out the checker was incorrect. This is a record of what automated checks miss.
Consolidating CS and Orders Scattered Across Platforms with AI — When APIs Work and When They Don't
The more sales channels you add, the more your orders and CS scatter. This piece separates the cases you can connect via API from the ones you can't, and lays out the line you should not cross because of account risk.
How a Small Team Runs a Company with AI — It Was a Loop, Not a Tool
If adopting AI has added more tasks instead of reducing them, it's not a tool you lack, but a structure. We've anonymized and summarized observations from a team handling multiple tasks with few members.
How to Build "Our Team's Own Engine" with a Golden Set Learning Loop
Instead of reviewing AI outputs anew each time, this method involves compiling successful results into a learning loop. It also explains why this loop is highlighted in investment evaluations.
Five Things to Set Up Before Choosing Tools for Small Team AI Automation
If you've used AI tools a few times but lack a team-wide system, there are five things to decide before selecting tools. We've organized them in the order of creating a loop that continuously learns what works well.
We tell others to break hypotheses into layers, yet our own ledger had not a single success criterion
To see whether a rule was being followed, we counted a word in our documents and got 3. When we opened them, all three only explained the concept; none actually applied it. Here is one number without that string trap instead.
Our course satisfaction score is 4.71. But there is another number we trust more
Satisfaction is a survey filled out anonymously right after a course. The number we trust more is a behavioral record: 11 organizations that came back to us, and a longest relationship of 4 years. We have also written down the limits of that number.
Writing Your Business Plan From Scratch Again? How to Connect What You Have Already Made
You end up writing a business plan from scratch each time not because you lack materials, but because your outputs do not use one another as evidence. Here is how to link five boxes, from customer definition to requirements, with "so."
"Where did that number come from?" — How to add sources and reference dates to your market research
Market size figures produced by AI often lack a reference date and a source. This article explains how to fill in four fields for every number (value, unit, date, source), and what to do when you can't: remove it or replace it with a number you counted yourself.
If You Can't Decide After Verification — The One Line That Separates GO/NO-GO
The reason decisions aren't made even after verification results are out is because the passing criteria are often set after the results are known. Here's a summary of one line to write before verification and four designs that make results unusable.
4 Things to Fill In Before Handing Off to an Outsourced Developer — The Real Reason You Can't Get a Quote
When you hand over requirements and the quote is slow or grows later, it's because the document has no cases in it. Fill in four things for every screen — state, condition, result, and failure — and it becomes a document a developer can decide from without asking back.
Three Steps to Your First Output with AI — What to Decide Before Picking a Tool
If you open an AI tool and still can't get started, the problem isn't which tool you chose — it's that you haven't decided what to make first. Here's how to settle three things up front: the name of the output, who will receive it, and the points you'll decide yourself.
"I hate sales more than anything" — 5 ways to sell anyway
You built the product. But selling is what scares you most. You write a cold email and delete it, it feels awkward to name a price, and you put it off for fear of rejection. Many solo founders stop right here. Not because they hate sales, but because they *learned it the wrong way*.
5 Things to Remove Before Launch — MVP is About Subtraction, Not Addition
We included 12 features in our first product. It took six months. Users only used two of them. The time spent on the remaining 10 was completely wasted. The essence of MVP lies in 'minimal', yet we are always obsessed with 'product'.
People Who Built Products Without Developers — 5 Principles for Solo Builders
"I can handle the planning, but I can't build it because I don't have a developer." Five years ago, that was true. Not anymore. There are already people building products that make money, alone, with AI tools.
Same Crisis, Different Fates: 4 Turning Points Between Companies That Survived and Those That Vanished
Kodak and Fujifilm took the same hit (the digital camera) in the same era. One went bankrupt; the other is still growing today as a cosmetics and medical company. There was little difference in their technical capabilities. What separated them was a single decision.
5 Growth Loops That Took Off With Zero Ad Spend
If you think marketing = ad spend, a solo founder loses before starting. Yet many of the fastest-growing products built growth into the product rather than buying ads. These are cases that grew through structure, not money.
About 70% of Shopping Carts Are Abandoned Before Checkout — 5 Designs That Remove Friction
You put real work into your product, and traffic is coming in. Yet most people vanish right before checkout. The reason isn't that the product is bad. It's one click too many. Good UX isn't about looking impressive — it's about being invisible.
How to Diagnose Your Business Through the Lenses of 4 World-Class Strategists
Everyone says "you need a strategy." But once you actually sit down at your desk, it is hard to know where to start. Large companies solve this with frameworks: they look at the same situation through 4 different lenses.
5 Times Customers Said "I'd Buy It" — and Nobody Did
In interviews, 9 customers told me, "I'll definitely use this once it's out." I launched it. 0 of the 9 paid. They weren't lying. That's simply how people answer.
The Real Reason a Market Leader Disappeared in Six Years — Dissecting Nokia
In 2007, Nokia was the dominant market leader, selling roughly 40% of the world's mobile phones.[^1] That same year, the iPhone came out. Six years later, Nokia sold off its entire phone business.[^2] The usual conclusion is "it couldn't keep up with innovation." But that is only half right.
5 Things We Fixed Before Prompts While Building an AI OS
When integrating AI into a business, prompts accumulate first, but verification, status, and records collapse first. Based on model fluctuations shown by Stanford and Berkeley and boundary experiments by Harvard and BCG, we summarize five things we fixed before prompts while building an AI OS. An AI business operation guide for solo entrepreneurs.
Watching Psick Univ's April Fools' Content Strategy on the Way to 3 Million Subscribers
I strongly agree with the saying "Funny people are smart people." In my case, I'm not that smart, so I'm not that funny, and I put a lot of effort into working on that.
A Special Opportunity for Business Owners in Jeju! 🌊 Take Your Business to the Next Level with IT Consulting!
🌟 "A Special Opportunity for Business Owners in Jeju! 🌊 Take Your Business to the Next Level with IT Consulting!" 🌟 Does IT feel difficult? Don't worry! We'd like to introduce a free one-on-one IT consulting program prepared especially for people running businesses in Jeju.
[Turn your startup dream into reality with AI] A business plan completed within one week. Start now!
🚀 Turn your startup dream into reality with AI! ✨ A business plan completed within one week. Start now! 👩💻 Make startup preparation easier and faster with the latest AI tools (scispace, perplexity, chat GPT, etc.) and IT tools (figma, notion, google drive, etc.).
A Guide to Data Analysis with ChatGPT: Public Data Analysis Even Beginners Can Do
This post shows how beginners can analyze public data easily with ChatGPT, and walks through a real analysis example to show how to apply it in practice.
What Is an MVP, the Success Formula for IT Businesses and Services? (An Overview of MVPs, with Tips)
What is an MVP? It is a basic version of a product built from its most important features so that its core value can reach the market quickly. It is one of the most effective ways to collect feedback from real users and use it to improve a product or service while keeping early development cost and time to a minimum.
First1000_CarSwitch: A Company That Followed the Startup Success Formula
First1000 is a newsletter that looks at how founders acquired their first 1,000 customers. It lets you learn the methods these companies chose in their early days, when they had almost no funding, to grow into large businesses.
23.06.30 PMF Consulting for a Pet Record Service
I have a backlog of lecture and consulting write-ups, so I plan to keep organizing and sharing them, starting with what I covered on the day itself. Topic and target of this PMF consulting session Visiting the Youth Startup Academy (a Korean government-run startup incubation program) each quarter always gives me a certain energy, so this time too I went to its building in Mokdong to hold the consulting session in person.
Basics, Costs, and Alternatives of No-Code Tools – Owned-Media Blog Automation Anyone Can Do for Early-Stage Companies (2)
Following the previous post (PESO Media and Media Marketing Strategy for Very Early-Stage Startups), this time we will look at the process you need to follow to automate a blog. One point I want to keep repeating: even with automation, you still need to check the content now and then, and the resulting blog will not be high-quality. If your goal is "building a low-cost channel to bring in users," I recommend going ahead with this strategy.
PESO Media and Media Marketing Strategy for Very Early-Stage Startups – Owned-Media Blog Automation Anyone Can Do for Early-Stage Companies (1)
I'll walk you through how to build early Owned-media through an automated blog. This is one methodology, not the only one: at the very beginning, I strongly recommend promoting and testing mainly through Earned-media, and if you have already secured initial funding, I recommend testing with Paid-media.
What a Stand-up Comedian (Comico) Taught Me About Running an IT Service (Design Thinking, User Research, Hypothesis Setting and Validation, and More)
This topic may feel a little removed from what we usually post on this channel, but I am writing it because an example like this can make it easier to understand how an IT service is run.
[Business] First1000_Slice: Approach Your Customers in a More Familiar Way
Using the Slice case from the First1000 series, we look at how a startup can approach customers in a familiar way and how it secured its early customers.
[Business/Service] What Is PMF, the Success Equation for Startups?
An overview of the concept and importance of PMF (Product-Market Fit), and the methods and process startups can use to achieve it.
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