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View overview of Fuel Autocalculation Process
The Fuel Autocalculation functionality has been designed to link to the fuel capacity/volume held against the vehicle variant. (DD.varia). On Finishing the rental agreement and invoicing the system automatically calculates the quantity and value of the fuel used and invoices if required (if off hire shows less than on hire). The recording of fuel usage is gauged visually in 1/8ths.
Note: The additional requirement for the inclusion of "ADDBLUE" fuel is currently in progress.
Set Fuel Autocalculation Process Parameters
The Method of Logging Fuel in the General 2 Tab of System Parameters must be set to I(con) in order to initiate the fuel autocalculation functionality. This ensures that at Start and Finish Rental the system prompts with a graphical fuel gauge calculation where the fuel reading may be logged in 1/8ths of a tank.
The Current Petrol Cost in the Deposits/Fuel Tab of System Parameters must be populated with the current cost of petrol value to be used in the calculation routine for petrol vehicles.
The Current Diesel Cost in the Deposits/Fuel Tab of System Parameters must be populated with the current cost of diesel value to be used in the calculation routine for diesel vehicles.
The Current Addblue Cost in the Deposits/Fuel Tab of System Parameters must be populated with the current cost of addblue value to be used in the calculation routine for diesel vehicles (addblue being an additive for diesel engines). The functionality for including this cost within the autocalculation of fuel is currently under development and until then this field is currently redundant.
The Fuel charge code must be populated in the General 2 Tab of System Parameters and this charge code must at the same time exist in the Charges table.
Populate Fuel Tank Capacity in the Vehicle Variant
The Fuel Tank Capacity field must be populated (against the Model Variant (DD.varia) in Franchise Data) for each vehicle variant that is to be used within the rental system.
The Addblue Tank Capacity field must be populated (against the Model Variant (DD.varia) in Franchise Data) for each diesel vehicle variant that is to be used within the rental system. The functionality for including this cost within the autocalculation of fuel is currently under development and until then this field is currently redundant.
When a rental agreement is started the Start Rental form prompts for
Fuel Level Out. Select the 
immediately to the
right of this field to display the Fuel Log form. Enter the fuel level at the start of the agreement with a single-left-click
of the mouse on the Out column against the appropriate measurement level (in eighths).
When a rental agreement is finished the Finish Rental form prompts for
Fuel Level In. Select the immediately to the
right of this field to display the Fuel Log form. Enter the fuel level at the end of the agreement with a single-left-click
of the mouse on the In column against the appropriate measurement level (in eighths).
The system now automatically calculates the cost of fuel used within the period of the rental agreement and places the appropriate Charge code (see Point 5 relating to System Parameters above) and associated value as a Charge in the Prices Tab to be invoiced.
The system performs the correct mathematical calculations based on Fuel Type (from DD.varia), Tank Capacity (also DD.varia), Cost of fuel (Rental System Parameters) and fuel log readings (from the rental agreement) :
Fuel type = P (etrol) (held in DD.varia)
Cost of Petrol (per litre) = £ 1.00 (held in DR.systm)
Tank Capacity = 100 Litres (held in DD.varia)
Qty Used = End Fuel - Start Fuel (held in DR.agree)
e.g Qty used = Full tank minus half tank= halftank
Tank Capacity = 100 Litres
Half Tank = 50 litres
50 litres of Petrol at £ 1.00 per litres = Charge of £ 50.00
