It is a value expressed in full months equivalent to the total work of a researcher throughout the project. To calculate this, begin by estimating the percentage of full-time working week for all tasks of a professional nature that is dedicated by the researcher in each of the different stages of the project. Examples:

• 1 person at 50% for 6 months = 3 person*month
• 1 person at 30% for 6 months = 1.8 person*month
• 1 person at 50% for 2 weeks = 0.25 person*month