The use of Cumulative Gross areas for Programmed Areas in the dRofus project
A Gross/Net factor can be applied at any Function level in the Function structure as either a percentage or as a multiplying factor (eg. 25% or 1.25).
The example shown below compares a conventional Schedule of Accommodation (SoA) to the same data and settings in dRofus.
In the SoA the there are separate Gross/Net factors applied at at the
Zone level ("Zone Gross/Net factor") for Engineering Allowance, and at the
Sub-department Levels ("Sub Department Gross/Net factor") for Circulation.
The calculated Programmed Gross Areas in the Green, Yellow, Purple and Blue sections are added together and the Zone Gross/Net factor is then applied to the combined Gross in the Red sections.
In summary - the calculations around the Gross/Net (also known as Grossing) factor depend on the assumed work process.
For Planned Areas the Gross/Net factor calculates the required Planned Net Area from a given Planned Gross Area at any given level of the Function Tree or, alternatively if a Planned Net and a Planned Gross are entered then the Gross /Net Factor is calculated (refer warning above).
For Programmed Areas, the Gross/Net factor is applied to the sum of the calculated Programmed Gross Areas of the Functions below which in turn have been calculated from the sum of the Programmed Room Areas with any Functional Area Grossing applied at the lower level.
For Designed Areas, the Designed Gross/Net factor is calculated as the ratio between the Designed Area Gross (as entered manually or synced from a Departmental Area item in the model) and the sum of the designed areas of all Rooms in those Departments.