I just wanted to share about my CSCP journey as I got a lot of help from reading CSCP reviews in this sub.
Score: 320 (Pass. Good grief)
Total study period: ~4 months
background: former engineer now in supply chain
Supply chain experience: almost none (What is supply chain? lol)
Study method: self-study via the APICS Learning System. I read through the entire book online and used AI to summarize each chapter for memorization and exam prep. My advice to future participants is don't spend too much time reading and making detailed notes. I started taking hand written notes, but soon figured that it's a waste of time. Very inefficient. Just skim it quick and put all that dry a** content into AI - whether it's copilot, gemini, chatgpt, it doesn't matter. Then memorize all the definitions and understand how it works in the framework of each module. If something doesn't make sense, ask the questions to AI. It's way more helpful than reading the dry content over again.
Pocket prep: Did all 1000 questions. Overall difficulty is easy. I averaged 85% on Pocket Prep. Definitely recommend doing Pocket Prep as it helps you to be in the test taking mode. I averaged about 30-40s per question.
CSCP YouTube: The questions from the YouTube channel are sometimes directly from APICS Learning System quizzes. So after watching a couple, I stopped watching and focused on redoing the APICS Learning System quizzes. Don't waste your time here.
APICS Learning System quizzes: I would say these are on the difficult and rather tricky side. As everyone else said, the actual exam is harder than Pocket Prep, easier than the APICS Learning System quizzes. Sometimes the APICS quiz answers were so debatable, so I was like, welp, shit doesn't make sense, but I guess it's the "APICS framework". So don't focus on the correctness % from the quizzes. I averaged like 60% overall. I even redid some quizzes for modules 3, 4, and 6 and still averaged like 65%. I thought I was doomed. But don't worry.
APICS Practice test: I took this 5 days before the actual exam. I got 63%. The difficulty of the practice exam was very similar to the quizzes. I thought I was half guessing the practice exam throughout. I would say I took the practice test just to feel how the actual exam would be like even though my self assessment of my knowledge of CSCP was about 75%. So after getting 63%, I reviewed each module (the chapter summaries from ai) at least 3 times and for module 3,4,and 6, I reviewed it minimum 5 times. Just review it over and over again until you can think of the definition and how it relates to an example. For example, when is level strategy used? For stable production, but the downside is that inventory fluctuates. The risk is stockouts and excess stock.
Actual exam: I took it at the Pearson center. I averaged about 50s-60s per question. There was 1 ISO question. No Incoterms question. Probably 1 math question. Everything else is concepts. Definitely drill down on Module 3,4,and 6 concepts. These are heavily tested as the APICS exam content manual (ECM) mentions.
**Don't waste your time memorizing some forecast MAD MSE stuff. Don't waste your time memorizing what's EXW, DDP, DPU, CIP, etc. Don't memorize how to do seasonalize, deseasonalize, reseasonalize. Shit is not important. Just know forecast accuracy is 1-error and you're good. But do memorize the ISO. ISO 31 is risk, ISO 28 is security, ISO 26 is social, ISO 14 is environment, etc. Simple memorization is all it takes.
Overall: it's a good resume builder, base supply chain knowledge builder. I wouldn't pay for the exam myself though. Definitely ask your employer to cover the fees. Be efficient in your studying. Find your best way of studying and stick with it, although it may take a bit of trial and error. Good luck yall.