Forum Discussion

Advocate I

4 years ago

Using parameters in calculated columns

I'm a bit confused here. I hope you can help me with this problem. For a housing association I want to make a forecast of the rental income for the next five years. I have to calculate this individ...

Advocate I

4 years ago

This is a small example of the data I use.

House_Id	CurrentRent	MaximumRent	%Rent
P0001	840	1050	80%
P0002	642	652	98%
P0003	548	1026	53%
P0004	849	1178	72%
P0005	428	676	63%
P0006	578	854	68%
P0007	637	854	75%
P0008	560	1046	54%
P0009	601	1176	51%
P0010	410	684	60%
P0011	870	1027	85%
P0012	668	1199	56%
P0013	714	968	74%
P0014	472	933	51%
P0015	687	1143	60%
P0016	814	1200	68%
P0017	657	685	96%
P0018	665	722	92%
P0019	442	747	59%

And the parameters on the report:

Parameters
Rent < 60% MaxRent	4,00%
Rent 60 - 75% MaxRent	3,00%
Rent 75 - 90% MaxRent	2,00%
Rent > 90% MaxRent	0,00%

And the result should be:

House_Id	Rent Year 1	Rent Year 2	Rent Year 3	Rent Year 4	Rent Year 5
P0001	856,80	873,94	891,41	909,24	927,43
P0002	642,00	642,00	642,00	642,00	642,00
P0003	569,92	592,72	616,43	634,92	653,97
P0004	874,47	900,70	918,72	937,09	955,83
P0005	440,84	454,07	467,69	481,72	496,17
P0006	595,34	613,20	631,60	650,54	663,55
P0007	656,11	669,23	682,62	696,27	710,19
P0008	582,40	605,70	629,92	648,82	668,29
P0009	625,04	650,04	676,04	703,08	731,21
P0010	426,40	439,19	452,37	465,94	479,92
P0011	887,40	905,15	923,25	941,72	941,72
P0012	694,72	722,51	744,18	766,51	789,50
P0013	735,42	750,13	765,13	780,43	796,04
P0014	490,88	510,52	530,94	552,17	574,26
P0015	707,61	728,84	750,70	773,22	796,42
P0016	838,42	863,57	889,48	916,16	934,49
P0017	657,00	657,00	657,00	657,00	657,00
P0018	665,00	665,00	665,00	665,00	665,00
P0019	459,68	473,47	487,67	502,30	517,37

And of course: totals by city, province and country.

So each year the rent is based on the rent in the previous year. In formula:

Rent Year i = Rent Year i-1 * ( 1 + a )

Where a is based on Rent Year i-1 / Maximum Rent and one of the four parameters.