WhatIf Simulation for a Brazilian Company Regarding Marketing Budget
Diogo Pinto[1]
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Spiru Haret University Bucharest
Abstract. The article research is a case study regarding how to design the marketing budget for a small Brazilian company that started the activity one year ago. Considering the data that we gather, we decided to use Whatif simulation. The case study is a simplified model representation of a company, adjusted according to the data that is released as target for the following year. In practice, the formulation of a scenario allows the construction of a hypothetical world that the analyst can see and navigate.
Keywords: Whatif, simulation, multidimensional, hypothetical, predict, business modelling, scenario, goal
seek.
Jel Codes: M31
1. Introduction
Whatif analysis is a specific method, whose purpose is to define the behaviour of a complex system, such as a business simulation, totally or partially, under some assumptions, called scenarios, are given. Having the ability to assess the impact precedence of a strategic or tactical move, in order to elaborate better strategies to achieve their objectives, managers need systems that are projected and trustworthy.
The case study presented is a simplified model representation of a company, adjusted according to the data released as target for the following year. In practice, the formulation of a scenario allows the construction of a hypothetical world that the analyst can observe and navigate.
2. Literature Review
Whatif analysis is centered on a simulation model, establishing a complex set of relationships between some business variables, corresponding to significant authorities in the field of trade (for example, costs, revenues, customers, services, etc.). A simulation model supports one or more sets, each describing one or more options to produce a forecast of interest to the user. The prediction takes the form of a multidimensional cube as presented in Fig. 1, which measures the dimensions and corresponding business variables, to be operated by the user interactively [www1].
Fig. 1: Illustration of Whatif analyses [www5]
A scenario is characterized by a subset of business variables, sonamed source variables and a set of additional patterns, called setting of standards that predisposes member to run the model and obtain a forecast.
The changing patterns among business variables are important because they allow the user to understand which are the '' variable values '' that it can independently adjust and drive the simulation.
Each simulation can generate different scenarios, one for each assignment of source variables and standard settings.
Importantly, the whatif analysis, it should not be confused with a sensitivity analysis, which aims to assess how sensitive the system behaviour is, due to a small change in one or more parameters. In addition, there is an important difference between the whatif analysis and forecast simple, widely used, especially in the banking and insurance sector. In fact, while the forecast is usually performed by extrapolating trends out of stored history information systems, whatif analysis requires simulation of complex phenomena, whose effects cannot simply be determined as a past data projection. On the other hand, application of prediction techniques is often required during hypothetical analysis [Golfarelli, 2006].
Some authors report a useful classification of forecasting methods to judge, such as those based on opinions and roleplaying and statistics, such as extrapolation methods, expert systems and rulebased forecast. The applicability of these methods to different domains is discussed, and an algorithm to select the best method depending on the specific characteristic of the problem in question. A special mention is for the system dynamics that has an approach to shape the behaviour of nonlinear systems, where the relations of cause and effect between abstract events are captured as dependencies between numeric variables. Generally, these dependencies can give rise to interaction retroactive cycles referred to, feedback loops.
From a mathematical point of view, differential equations systems are the right tool for modelling such systems. However, a solution cannot be found analytically or by numerically mode, such that some techniques are often used to predict the system behaviour. A model of a dynamic system consists in a set of variables related to each other, classified as stock and flow variables; flow variables represent the rate at which the accumulation level of the variable bank changes. By running simulations that model, the user can understand how the system will evolve in time, as a result of a hypothetical action; it can also be observed, each time, the values assumed by the model variables and (possibly) modify them. So it seems that the dynamics of the system can actually support whatif in applications where the current status of any part of the system can influence their own future status through a closed chain of dependency links [Lee, 2006].
Designing a whatif application requires a methodological framework; the one presented in [6] relies on seven stages:
1) Goal Analysis, which aims to determine which business events are to be simulated, and how they will be featured. The goals are expressed by:
a) identify the set of business variables the user wants to monitor and its granularity;
b) defining relevant scenarios in terms of the user source variables to be controlled.
2) The business modelling, building a simplified model of the application domain, in order to help the designer to understand the business phenomenon and give you some preliminary indications about which aspects can be overlooked or simplified for simulation.
3) Analysis of the source data, aimed to understand what information is available to conduct the simulation and how it is structured.
4) Multidimensional modelling, which defines the multidimensional diagram describing the prediction by taking into account the static part of the business model produced in step 2, and respecting the requirements expressed in stage 1.
5) Simulation modelling, whose goal is to define, based on the business model, the simulation model allowing the prediction to be built for each given scenario, from the available database.
6) Design and implementation of data, during which the multidimensional prediction and layout of the simulation model are implemented on the platform chosen, to create a prototype for testing.
7) Validation, aimed to evaluate, in conjunction with the users, how faithful simulation model is the actual business model and how reliable the forecast is. If the approximation introduced by the simulation model is considered to be unacceptable, steps 47 must be repeated to produce a new prototype.
3. Case Study of a Brazilian Company
Company A, based in Brazil, in 2015 had a profit of 14,800 (Figure 2). For the following year they researched two types of market, the first open a branch in Portugal and the second continues to expand in Brazil.
The company (A) offer Java courses entitled the final diploma. The company have in Brazil about 20 classes with 20 students each class. The course lasts for 40h that is distributed twice weekly 4h. Each student pays a value of 200 in order to enrol in the course. It has 2 teachers. In the figure 2 S is one of the school teachers and D is another teacher. The teachers also play the part of school management, each of them having a small meeting room for a monthly salary of 1,200 . They have a fixed cost of 75 each 4h of renting the room. The company have some events as the final snack and banners placed around the room for advertising. This year the company spent no money on travel.
Company A in Brasil  data for the year 2015 

Students per Group 
20 
200 
4 000 

Groups per year 
20 
80 000 

Employees 
33 600 


S 
1 200 
14 
16 800 


D 
1 200 
14 
16 800 

Publicity 
5% 
4 000 

Fixed Cost 
15 600 


Rent space 
75 
4h 
4 
300 

Events Spendings 
12 000 


Snack 
400 
8 000 


Banners 
4 000 

Travels 
0 




Marketing Budget 
65 200 




Profit 





14 800 
Fig. 2: Marketing Budget Company A (2015)
Using Whatif simulations, we can replace the values that we find most appropriate for the new reality to create a scenario. In this case, we will replace values as advertising for 18.000, as if we are entering a new market should come into force. Waited have a monetary increase the level of students, for the course in Portugal will cost 300 which is the average in Portugal, but at the same time brings more expenses like space and spending events and trips will have a higher cost, they will travel across the country (Fig 3.).
Scenario Summary 




Actual Values 
Company A open in Portugal 
Variables 



Groups per year 
80 000 
120 000 

Employees 
33 600 
42 000 

Publicity 

4 000 
18 000 
Fixed Cost 
15 600 
20 800 

Events Spendings 
12 000 
15 000 

Travels 

0 
8 000 
Marketing Budget 
65 200 
103 800 

Result 



Profit 

14 800 
16 200 
Fig. 3: Scenario for Company A open in Portugal
The other scenario that will be tested is the company extension in Brazil, increasing the number of teachers, for example. Increasing teachers means increasing class sizes and get more during the year, otherwise it has to be increased the spending on space because it had been leased more rooms in order to give the lessons (Fig 6.). Comparing the two scenarios it can be drawn the conclusions, and see what is more profitable for the company and let the manager choose the best option to take into account.
Fig. 4: Change Values Fig 5 : Choose scenario 4
Fig 6 : All possible scenarios
It can be concluded that the enterprise should expand in Brazil instead of opening a branch in Portugal, because it could get more profit through this choice. In both scenarios we can see that there are some negative variables as advertising increase, because if they come in Portugal is a new market and have come into force to achieve fill classes. They paid travel to travel between Brazil and Portugal and even in the interior of Brazil to open up more courses in more states. Fixed costs vary because in Portugal will be more expensive lease a room than in Brazil, on the other hand will lease more times the rooms in Brazil to be able to more classes.
4. Conclusion
In short, whatif analysis is proper to give fast simulations of values in various scenarios that can be chosen. The case study reveals that for the Company A is better to extend the activity on Brazil market, than on Portugal market. In all the results we get, we can see that it is better to extend the courses to more states in Brazil than open already in Portugal this kind of Java courses.
Although we have the negative variables also we get positive variables by increasing values in Portugal because they are more expensive courses and Brazil get extend the java courses in more states.
Either way would be to gain more profit than at present, but makes the company the first to explore the market Brazil with its course of Java.
5. Further Research
This company could also resort to Monte Carlo simulation. It is a more reliable application that brings more accurate results when talking about launching a new product on the market. Monte Carlo method (MMC) rely on massive random samples to obtain numerical results, this is, repeating successive simulations a high number of times to calculate heuristically probabilities as if in fact they are incurred actual results casino game [www5]. MMC it can be used for evaluation of riskiness of lunching new products on a new market, for the forecast of net income, predicting structural costs, acquisition costs, determining susceptibility to various risk factors.
The company has to take into account the expansion on online market.
6. References
[1] [www1] http://g82.cz/dcm/ex_Whatif_Simulations.html (accesed on 14.05.2016).
[2] [www2] http://www.sciencedirect.com/science/article/pii/089571779090156H (accesed on 14.05.2016).
[4] [www3] http://www.kinaxis.com/en/product/rapidresponsesupplychainsoftwarecapabilities/supplychainwhatifanalysis/ (accesed on 14.05.2016).
[5] [www4] http://help.bizagi.com/processmodeler/en/index.html?what_if_analysis.htm (accesed on 14.05.2016).
[6] [www5] https://pt.wikipedia.org/wiki/M%C3%A9todo_de_Monte_Carlo (accesed on 14.05.2016)
[7] [Golfarelli, 2006] Golfarelli M., Rizzi S., and Proli A. Designing whatif analysis: towards a methodology. In Proceedings of the DOLAP. Arlington, VA, 2006, pp. 5158.
[8] [Lee, 2006] Lee C., Huang H.C., Liu B., and Xu Z. Development of timed color petri net simulation models for air cargo terminal operations. Comput. Ind. Eng., 51(1):102110, 2006.
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Copyright (c) 2016 Diogo André Pinto
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