Find the best investment and financing program using the Dean Model.
Dean Model is simultaneous analysis of investment and financing options. Mathematically the model can be formulated using the variables and parameters below:
Objective function:
called as compounded Value (CV)
with
here Xj is extent of investment projects (here 1 to 5)
and Yj is the extent of financing options (here 1 to 4 for A to D)
and Aj1 and Di1 are the net cashflows associated with each project in time 1 and 0 for O subscripts
Let us consider the below provided data:
Invesment Options | Initial invesment | IRR | Rank | Capital Flow at year 1 |
1 | 400 | 19.10% | 2 | 476.4 |
2 | 200 | 18.50% | 3 | 237 |
3 | 100 | 22% | 1 | 122 |
4 | 100 | 6.50% | 5 | 106.5 |
5 | 50 | 13% | 4 | 56.5 |
Financing options | Amount | Interest | Rank | Capital flow at year 1 |
A | 200 | 11% | 2 | 222 |
B | 300 | 10% | 1 | 330 |
C | 300 | 12% | 3 | 336 |
D | 200 | 15% | 4 | 230 |
The capital flow for first yearin invesments and financing is calculated using following function= initial investment/amount *(1+ IRR or interest) and rank is derived on the basisof IRR and interest. (lower interest better and Higher IRR is better)
Hence the objective function stands for year 1 as:
476.4*x1 + 237* x2 + 122* x3 + 106.5* x4 + 56.5* x5 - 222* y1 - 330* y2 - 336* y3 - 230* y4 >>>>> Maximize
with for year 0 (initial values)
-400*x1 -200* x2 -100* x3 - 100* x4 - 50* x5 + 200* y1 + 300* y2 + 300* y3 + 200* y4
1. Eliminating invesmentes and financing options
invesment options and financing options can be eliminated first on the basis of graph plotting on the accumulated manner and in ranking order.
invesments options | financing option | Initial invesments | interest rate of financing | IRR of projects |
3 | 2 | 50 | 10% | 22% |
3 | 2 | 100 | 10% | 22% |
3,1 | 2 | 150 | 10% | 19.10% |
3,1 | 2 | 200 | 10% | 19.10% |
3,1 | 2 | 250 | 10% | 19.10% |
3,1 | 2 | 300 | 10% | 19.10% |
3,1 | 2,1 | 350 | 11% | 19.10% |
3,1 | 2,1 | 400 | 11% | 19.10% |
3,1 | 2,1 | 450 | 11% | 19.10% |
3,1 | 2,1 | 500 | 11% | 19.10% |
3,1,2 | 2,1,3 | 550 | 12% | 18.50% |
3,1,2 | 2,1,3 | 600 | 12% | 18.50% |
3,1,2 | 2,1,3 | 650 | 12% | 18.50% |
3,1,2 | 2,1,3 | 700 | 12% | 18.50% |
3,1,2,5 | 2,1,3 | 750 | 12% | 13% |
3,1,2,5,4 | 2,1,3 | 800 | 12% | 6.50% |
3,1,2,5,4 | 2,1,3,4 | 850 | 15% | 6.50% |
2,1,3,4 | 900 | 15% | ||
2,1,3,4 | 950 | 15% | ||
2,1,3,4 | 1000 | 15% |
From the above accumulated numbers it is clear that invesment option 4 and financing option 4 (D) are completely out of picture as at this point the interest fall above IRR of projects.
hence options left for invesments are 1,2,3 and 5. and financing options left are 1,2,3.
The possible combinations of invesments with these options are as follows with their compounded values:
proportion of funding type | Compounded value | |||||
Strategy Number | invesments considered | invesments required | 1 | 2 | 3 | |
1 | 1 | 400 | 50% | 100% | 0% | 35.4 |
2 | 2 | 200 | 0% | 67% | 0% | 17.22 |
3 | 3 | 100 | 0% | 33% | 0% | 12.11 |
4 | 5 | 50 | 0% | 17% | 0% | 1.5 |
5 | 1,2 | 600 | 100% | 100% | 33% | 49.512 |
6 | 1,3 | 500 | 100% | 100% | 0% | 46.4 |
7 | 1,5 | 450 | 75% | 100% | 0% | 36.4 |
8 | 2,3 | 300 | 0% | 100% | 0% | 29 |
9 | 2,5 | 250 | 0% | 83% | 0% | 18.5 |
10 | 3,5 | 150 | 0% | 50% | 0% | 13.5 |
11 | 1,2,3 | 700 | 100% | 100% | 67% | 59.624 |
12 | 2,3,5 | 350 | 25% | 100% | 0% | 30 |
13 | 3,5,1 | 550 | 100% | 100% | 17% | 46.9 |
14 | 1,2,5 | 650 | 100% | 100% | 50% | 49.9 |
15 | 1,2,3,5 | 750 | 100% | 100% | 83% | 59.9 |
Hence from the above options , strategy number 15 is the best option as it has highest Coompounded Value of 59.9
hence best option with dean model is investment in 1,2,3,5 with funding from A, B and C (83.33%).
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