‘The act of forming an opinion of the amount, value or quality of something after thinking about it carefully’ (Oxford Learner’s Dictionaries).
A systematic and objective assessment of an on-going or completed project, programme or policy, its design, implementation and results.
Evaluation focuses on the macro level, considering the context of learning and related factors. Assessment measures learning at the micro or learner level and is one element of evaluation. Evaluation should inform next steps and on-going improvement.
An evaluation (work) plan should specify what will be evaluated, how and when, together with the evaluation design, practices, and procedures to use in conducting the evaluation.