No adequate measurement documents for determining period average

<LS>&CAUSE&</>
You have not defined a sufficient number of measurement documents
within the periods for long and short-term analysis defined in
Customizing.

System Response

The system is unable to calculate at least one of the values
<LS>average daily fleet object activity </>or <LS>average </>
<LS>daily fleet object consumption</>. Consequently, the <LS>calculated
consumption</> cannot be calculated from these values.

How to fix this error?

Extend the corresponding period(s) in Customizing.

Error message extract from SAP system. Copyright SAP SE.