The ADDIE instructional design model is a well-proven process used by instructional designers and training developers around the world to create learning interventions.
The capability and/or performance gap is clarified, the instructional goals and objectives are established and the learning environment and learner's existing knowledge and skills are identified.
@jclarkegardener has created a series of videos on YouTube that explain each phase of ADDIE, the first of these covers the Analysis phase.
Deals with learning objectives, assessment instruments, exercises, content, subject matter analysis, lesson planning and media selection. The design phase should be systematic and specific.
Instructional designers and developers create and assemble the content assets that were blueprinted in the design phase. In this phase content is written and graphics are designed. If eLearning is involved, developers build the online elements.
Any facilitators are briefed and trained as needed. The facilitators' training should cover the course curriculum, learning outcomes, method(s) of delivery, and assessment processes.
There are three parts, formative, summative and business impact.