Jump to Content | About Energy Map | Glossary | Contact Us | Sitemap | Advanced Search

Step 8: Survey energy use & identify variances

As each vehicle will be reporting slightly different – or occasionally widely different – fuel usages, you will need to delve deeper into what each vehicle does, how it is driven and why.

Calculate Fuel usage by vehicle & driver

First action is to correlate drivers and vehicles with distance, fuel used and to produce a figure for fuel usage in Litres per 100Km by driver.

  • Litres per 100Km = Fuel Used in Litres / (Distance Travelled in Km / 100).
  • Litres used per 100Km - for each fuel. Green diesel usage does not correlate with distance travelled, as with all auxiliary power units, usage may depend on temperatures, hours worked rather than distance travelled.
  • Fleet Average; compare the usage for each vehicle against the fleet usage as a whole. This will help to highlight groups of vehicles using significantly more fuel.
VehicleNormal driverType

 

Fuel type

Litres per 100KmVs Fleet Average
09 D 1234560010 M.MurphyCarPetrol12.00Avg.
08 C 1234560200 C.KellyVanDiesel22.00-10%
09 G 1234560002 J.O’KellyTruckDiesel38.00+5%
O8 L 1234560006 K.MurphyVanDiesel18.00+10%

Calculate Energy Efficiency

Companies that achieve high km-per-litre figures do not necessarily have the most energy efficient distribution operations. High fuel usage can be offset by poor utilisation of vehicle capacity. Energy efficiency is best measured by a composite index which expresses fuel consumption on a pallet-km (or similar unit of work) rather than vehicle-km basis.

Once you are certain of your volume usage by vehicle, collect the figures for useful work produced by those vehicles, as your company understands it e.g.

  • Number of jobs completed by a service engineer
  • Tonnes of goods delivered for a long-distance heavy goods vehicle
  • Number of cases delivered for a multi-drop delivery vehicle
  • Number of passengers carried

At this early stage it may not be possible to complete this step and develop an Energy Efficiency measure, but these figures will inform your business case for change.

Identify drivers to be surveyed

You should plan to accompany the drivers in their vehicles over a typical working day. To start, this could be from any one depot, but ideally you will survey all drivers and depots over time.     

Plan Vehicle Survey

Use the data you have gathered above to plan your survey. Identify questions you need answered and create a checklist for you or your team members, to ensure you survey all aspects highlighted so far. Plan to go out with selected drivers, in this instance the vehicle reporting above average fuel usage.

VehicleNormal driverType

 

Fuel type

Litres per 100KmVs Fleet Average
09 D 1234560010 M.MurphyCarPetrol12.00Avg.
08 C 1234560200 C.KellyVanDiesel22.00-10%
09 G 1234560002 J.O’KellyTruckDiesel38.00+5%
O8 L 1234560006 K.MurphyVanDiesel18.00+10%

See step 9 for detailed survey actions .

Survey sites

Each company’s collection, rest and delivery sites are different, examples include;

  • Warehouses, purpose built for trucks or vans
  • Shops with adjacent delivery areas, parking or on-street
  • Difficult to reach shops in cities or pedestrian areas
  • Delivery points or access points adjacent to residential areas (some apartment blocks have been built very recently, so even dedicated delivery points need to be checked)

When accompanying drivers you will discover issues impacting on fuel usage, for example with large trucks it may be excessive manoeuvring or waiting times at delivery points. This not only wastes significant amounts of fuel, but also increases tire wear and decreases driver productivity.

Look for tight turning areas, areas that may be blocked by cars parking or security barriers and bollards. In some instances building work will have dramatically changed an originally well designed delivery and collection area, or rubbish may have been allowed to pile up in the vehicles’ turning area.

Tip: Use a digital camera to record and illustrate these issues. Make sure the camera’s flash is powerful enough for photographing delivery areas at night.    

Important information regarding cookies and seai.ie

By using this website, you consent to the use of cookies in accordance with the SEAI Cookie Policy.

For more information on cookies see our cookie policy.