Scaling for Daily Commute

It's often not possible to get all cast and crew to complete an onboarding form. As a result Daily Commute emissions have the ability to be scaled in accordance with the shoot size.

Turning scaling on and off:

  • Scaling can be turned off entirely for all daily emissions (shoot days and periods) from commuting under Daily Commute Commute Defaults Settings through the Enable Scaling setting (this will override independent scaling controls).
  • Scaling can also be turned off for each shoot day or period independently. This is done through that shoot day or period's Period Details page, under the setting Scale Emissions. By default this is turned to On when creating a new shoot day, and Off when creating a new period.

Setting the parameters on scaling

The main control on scaling is your crew size. 

  • Under Daily Commute Commute Defaults Settings there is the option to define the Average Daily Cast & Crew Size ("shoot average").
  • Then within each shoot day or period's Period Details page you can set that shoot day or period's Total Cast & Crew Size (note for periods this should be the daily average). If this is set, then it will override the shoot average.
  • You can also specify whether to scale an individual shoot day or period to the shoot average through the setting Scale Emissions to Shoot Average on the Period Details page. If this is turned off, and if you have not specified the total for that shoot day or period, then no scaling will be applied.

How the scaling works

Scaling is applied by scaling each of the individual routes travelled by people on each given shoot day or period.

We do this by calculating a scaling coefficient. This is calculated as the Total Cast & Crew Size for that particular shoot day or period (of it not specified, then shoot Average Daily Cast & Crew Size), divided by the total number of cast & crew for whom routes have been recorded on that particular shoot day or period.

The total route Km travelled by each person on that shoot day or period is then multiplied by the scaling coefficient. The logic follows that the sum of all recorded routes travelled, will be proportionate (the scaling coefficient) to the sum of all cast and crew travelled. By applying the coefficient to each route individually we assume that the distances travelled for the recorded people, are representative in distribution for the total cast and crew. 

There are two basis on which you can apply scaling: Average Vehicle Basis (default), or the Representative Basis.

Please note that there is a risk with scaling when a few people are used to scale for many as this will skew the data from the reality. It is important to get as many people as possible to complete the onboarding form to avoid this scaling issue.

Average Vehicle Basis

This basis assumes that everyone for whom you do not have recorded data, is commuting travelling in their own private vehicle, and applies the default private vehicle emission factor to all scaling.

Representative Basis

The Representative Basis scaling algorithm assumes that all recorded cast & crew data is representative also of the travel mode and vehicle for the total cast and crew.

Rather than applying the default private vehicle emission factor, it scales also the travel mode and vehicles in the recorded data. 

Apply Scaling to Departments and Tracking

When on, scaling will also carry the department and tracking codes from the recorded data, meaning the scaled emissions will apply to them. This is useful if you have a large recorded data set. 

It is Off by default, and when off all scaled emissions will be added to the Other department without tracking.

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