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Finally passed my TOC exam after failing twice — here's what actually worked

by David K. 30 views3 replies
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David K.OP
May 27, 2026

I've been lurking on this forum for months and figured it was time to give back since you all helped me so much. I work in supply chain for a mid-size manufacturer and my company basically told me I had two more attempts to get my TOC certification or they'd pull the funding. No pressure, right? My first two attempts I scored a 68 and a 71 — so close but not close enough.

What finally clicked for me was ditching the textbook-only approach and actually doing timed TOC practice test sets every single day for the last three weeks. I'd been reading Goldratt religiously but couldn't translate that knowledge under exam conditions. Also spent about two hours breaking down constraint identification scenarios specifically — that topic wrecked me on attempt two.

Passed with an 82 on my third try. Happy to share my full study guide breakdown if anyone wants it. What topics are you all struggling with most?

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Chris D.
May 28, 2026
Congrats on passing! Constraint identification was my nemesis too. What helped me was drawing out the system diagrams by hand instead of just reading about them — something about writing it physically made the logic stick. I used about 6 weeks total, roughly 45 minutes a day. The throughput accounting questions felt way harder on the real exam than anything I'd seen in prep materials, so just a heads up for anyone studying now.
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Jessica L.
May 28, 2026
This is really encouraging to read. I'm on my first attempt coming up in about three weeks and honestly feeling underprepared. I've gone through one study guide cover to cover but I'm not confident on the current reality tree and future reality tree stuff at all. Did you find there were a lot of those on the exam? And did the practice tests you used feel close to the actual difficulty level?
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Mike_T
May 28, 2026
Third time passing is still passing — welcome to the club. My biggest exam tip: don't second-guess yourself on the throughput vs. cost accounting distinctions. First instinct is usually right on those. You put in the work, that's what shows.

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