'B2B Sales Training' — Instructor John Kim, Hyosung Information Systems HIS

I built an app in the middle of a lecture. Really.

This happened yesterday at the B2B sales training for the Hyosung Information Systems sales team. (I’m a Hyosung alumnus too ^^) In B2B sales, one question comes up again and again: "Why are you so much more expensive than HP or Dell?" Price resistance keeps recurring for one reason: customers can’t see the full picture of total cost of ownership (TCO). Explaining in words won’t persuade a customer who judges only by purchase price. They are convinced when you show them the numbers directly. So the night before the training, I built a TCO calculator web app myself with Claude Cowork. You enter equipment quantity, maintenance cycle, and downtime risk, and it automatically calculates the real cost difference versus competitors.

But something even more interesting happened during the session. While talking with a participant on site, I saw parts of the app that needed improvement. I recorded that conversation right away, handed the transcript to Claude, and told it to make the changes. While I carried on teaching, Claude was revising the app, and I shared the updated version in the group chat mid-session. Then one participant asked, "These numbers are so realistic… how did you know all of them?" I answered honestly: "I didn’t know either. I left it to the AI and it filled them in on its own."

Three takeaways from this training.

① Instructors can now be developers in real time. You can build a tool that reflects participant feedback on the spot, mid-session.

② The outcome changes. Participants leave with a tool they can use at work tomorrow, not just slides.

③ AI understands the language of field experts. Automatically generating figures that fit industry reality from a single transcript is more than simple automation.

My direction for training this year is clear: while teaching, build a custom AI web app for participants in real time. The era of corporate training that goes beyond knowledge transfer to building on-the-job tools has 'already' begun.