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Sensitivity Analysis vs. Scenario Analysis: What You Need To Know

March 4, 2022 Vena Solutions  
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The main difference between sensitivity analysis and scenario analysis is the former assesses the result of changing one variable at a time, while the latter examines the result of changing all possible variables at the same time. They are both methods you can use to evaluate the level of risk involved in a variety of situations.

All business decisions are based on a set of assumptions that always come with a certain level of risk. While you may never have the power to see the definitive outcome of every business decision prior to making it, knowing how to utilize effective analytical and forecasting tools is crucial to assess the scale of those risks against the potential benefits.

But when do you use sensitivity analysis vs. scenario analysis? Let’s dig a little deeper.

When To Use Scenario Analysis

Be it in life or business, nothing is certain, but uncertainty. Scenario analysis provides a structured way to guide strategic decision making by exploring the different possible impacts of a range of events.

To be clear: Scenario analysis doesn’t aim to predict a single outcome to any of these sample scenarios. Rather, it explores a range of potential outcomes from best- to worst-case scenarios. This allows you to better prepare for a variety of scenarios and to make nimble decisions when they happen in order to still meet specific business objectives.

Scenario analysis allows for a more proactive assessment of potential risk, ultimately driving better decision making as a result. It focuses less on definitive outcomes and more so on predicting several possible outcomes that are all valid, though uncertain. In business cases, it can be used to improve systems thinking and provide clarity on how to best allocate resources.

However, scenario analysis is not without its downsides. It is a fairly time-consuming process that often requires a specific set of skills and expertise to effectively complete. That being said, there are planning platforms available in order to help consider all possible scenarios presented by this method of analysis.

When To Use Sensitivity Analysis

Also called “what-if” analysis, sensitivity analysis differs from scenario analysis in that it determines how a change in one variable affects the possible outcome. 

Sensitivity analysis is beneficial specifically for fact checking and providing an in-depth forecast as it deals with the likelihood of success or failure for variable scenarios. In a business setting, you can utilize this forecasting method to predict the return on investment of a specific project.

Something to keep in mind when using this method is that the use of historical data can potentially lead to unreliable results. These types of inaccuracies can occur since past outcomes do not necessarily mean similar future outcomes will take place as well.

Combining Analysis Methods for More Accurate Forecasting

Sensitivity analysis vs. scenario analysis: Should you use them together or independently? You can reap a lot of benefits from using the two together. By doing so, you can gain a more comprehensive view of possible outcomes and better prepare for them. 

For example, a post-secondary school is considering developing a new student learning center on campus. They decide to run a financial forecasting model to determine the impact of their investment. First, they do a scenario analysis to find a base-, best- and worst-case scenario. 

From there, conducting a sensitivity analysis would supply more nuanced information regarding one of these possible scenarios. In this case, the school may be looking at how a potential 5% increase or decrease in revenue would affect their bottom line if they move forward with this investment. Which costs are flexible or inflexible to this change in revenue? Rent is inflexible, but will the ability to control the salaries of the center’s staff, the overhead costs, etc. be enough to keep their revenue positive? Conducting a sensitivity analysis can help the school’s leaders gain a clearer picture of what the optimal budget would be for a project of this size.

Standalone analysis—either sensitivity or scenario on its own—would not provide the full picture. Ultimately, using both scenario planning methods in conjunction with one another will help you forecast more accurately and diminish the risk potential. And a Complete Planning platform like Vena makes it easy.

Strategically Position Your Business Through Analysis and Complete Planning

The future is full of uncertainties, but that doesn’t mean you can’t be prepared—and with Vena’s help, unknowns are manageable when backed by predictive modeling.

With our scenario planning and analysis software, you’re able to mitigate risk with agile scenario modeling. We harness the full power of live data in a secure, centralized database so that you’re able to capture a precise picture of your organization’s financial health, enabling you to make business decisions much more confidently. 

Additionally, with Vena you can:

  • Reduce data inaccuracies due to human error
  • Increase efficiency through automatic data loading
  • Generate more reliable predictive analytics
  • Scale your processes while staying within Excel

Ready to get started? Contact us today to request a demo.

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