Good planning is the most essential part of any M&E system. Many M&E systems fall into disuse because too little attention is given to detail at the planning stage. The purpose of an M&E plan is to encourage project or programme staff to think clearly about what they intend doing in the way of M&E before implementation of a project or programme begins, and to ensure those plans are adequately documented.
This is paper number 5 in the Monitoring and Evaluation Planning Series.
Monitoring and Evaluation Planning Series. M&E Plans. 5