Difference between Record measured values and required characteristic?

Dear experts,

Could you please let me know the difference between Record measured value indicator and required characteristic?

when i press F1 it says for Record measured value, if you set this indicator, measured values for this characteristic have to be inspected and confirmed.

Exactly it does the same when you select the required characteristic indicator, you need to enter the result for a req characteristic and change status to 5.

Please let me know the difference.

Thanks,

Pavan