4 Calculation steps (original) (raw)
The principle of the FABLE Calculator is to define several steps of calculation where, with the exception of the first step, all steps are dependent on one or several variable(s) that are computed in the previous steps. This is represented by the arrows in Figure 6. For instance, we first need to compute the targeted human consumption as this will be used to compute the targeted livestock production and the targeted crop production. The numbering of the calculation worksheets in the FABLE Calculator reflects the sequence of the calculation steps that is required:
- 1_calc_human_demand (Step 1 in Figure 6)
- 2_calc_livestock (Step 2)
- 3_calc_crops (Step 3),
- 4_calc_land (steps 4, 5 and 6),
- 5_feas_livestock (step 7),
- 6_feas_crops (step 8),
- 7_feas_consohum (step 9),
- 8_calc_emissions (step 10),
- 9_calc_water (step 10).
In each calculation worksheet, there are several tables which use data input and calculation results from previous steps and which themselves can be referenced in the formulas of the tables defined in next steps.
Figure 6. Sequence of the calculation steps in the FABLE Calculator
