Those evaluations should be based upon relevant data and supplemented, where relevant, by surveys on the most deprived persons who have benefited from the operational programme and, if necessary, by evaluations during the programming period.
Ba cheart a bheith na meastóireachtaí sin a bhunú ar shonraí ábhartha. Maidir le meastóireachtaí ex-post ba cheart iad a fhorlíonadh, i gcás inarb ábhartha, le suirbhéanna ar na daoine is díothaí a thairbhigh den chlár oibríochtúil, agus, más gá, le meastóireachtaí le linn na tréimhse cláraithe.