The objective of this article is to design and characterize the technical performance of the agricultural residue grinding function integrated into the operation of a multi-purpose cereal thresher. For the farmer, this equipment will have the advantage to realize out threshing, grinding, and water pumping. Water pumping will allowwatering the agricultural residues after their grinding.The Functional Analysis (FA) was used to identify new useful functions and technical solutions for the grinding function to be integrated into the design. The multifunctional thresher-grinder has been designed and manufactured. Grinding performance tests compared to manual machete cutting of corn and rice residues were performed. The results show that production times per tonne of the broyats are higher than those of manual machete cutting more than 61%. The size of the broyats is reduced from 17 to 72%, and the diameter from 71 to 80% compared to manual machete cutting. These results will be used as benchmarks for testing other types of residues.

This document shows the difficulties encountered by railway companies in the operation of locomotives. He makes a special mention in the case of International African Transport Company by RAIL. To do this, the history of International African Transport Company by RAIL locomotive operating failures has allowed us to calculate their operational availability, their mean times of failure,2wsa3ewdcxe3rtf2wsa3ewdcxe3rtf6 and their average technical repair times. The analysis shows that out of twenty locomotives, 60 percent has an operational availability below the 95 percent reference value. Using the functional analysis method, the locomotive operating indicators are evaluated and represented in Operation Functional Specification showing the deficiencies and achievements. Ishikawa has also been used on the traction motor, the element at the origin of the unavailability of locomotives, to identify the major causes, allowing making proposals for solutions, to improve the operational availability of traction engines and, in turn, of locomotives.