Hi Stephen,
As Kumar says ECM is part of HCM and is utilized to process pay and incentive adjustments. There is no separate programming course specifically for ECM, but there is an introductory course HR350 for Programming in HCM. There is a configuration course for Enterprise Compensation Management - HR540.
The basic set-up of ECM does not require programming but it is configured in IMG: Personnel Administration --> Enterprise Compensation Management. Here you develop budgets and the various compensation plans and long term incentive plans with rules, guidelines and programs.
We have used ECM for the past 7 years (now on ECC 6.0 Ehp5) and I can answer specific questions on your set-up. We do use programming for override tables (processing someone outside the rules) and for some custom reports. But the basic set-up is done with config.
Paul