The annual count is where the year's accumulated approximations become one number, usually over a weekend, usually in December, usually by people who would rather be somewhere else.
Cycle counting during the year changes the shape of that. Locations are counted on a rolling basis, variances are investigated when they are small and recent rather than large and old, and the year-end count becomes a confirmation rather than a discovery. You can pull the position, the movements behind it and the corrections with their reasons at any point in the year, which is the same information you would otherwise assemble in January.
If you work with several clients in this position, the partner programme sets out how a referral or an advisory arrangement works: