Answer:
Staff estimates
Explanation:
Staff estimate are estimates given by staffs generate an information. It involves the gathering of data from various individual and the estimates to have a conclusion.
The head of the unit provided a more details estimates as it involves everyone under him while others make the estimate of their own jurisdiction. .
Estimates can be done using mouth, it can be put in writing or typed to make it more formal
Staff head do the overall presentation to the leader or the person in charge
