DCF Simulation
I ran simulation of DCF cashflows with uncertainty in inputs. For this, I have taken basic RISK Model as a reference.
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Uncertain Inputs
In this model, the following inputs are uncertain:

Investment cost

Year 1 revenue

Annual fixed cost

Annual revenue growth rate

Annual variable cost percentage
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Meaning of uncertainty in this context
For example, you may estimate average growth rate to be 5% but in reality there will always be certain variation right? it may have a standard deviation of up to +/ 2% (example) based on historical forecast errors. Here you might go for a normal distribution.
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The decision of what distribution to consider for what parameter depends on the context.
Similarly, you may estimate the 1st year revenue to be within a particular range say Rs. 75k to Rs. 125k but somewhat near to Rs. 1.15 Lakh. Here you may go for Triangle Distribution.
Whenever there is uncertainty, we need to choose a suitable distribution for each input and then run a simulation "n" number of times to know the final range of output within certain level of confidence.
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Simulation Details

Number of Iterations 5,000

Cashflows: 10 Years

Fixed Discount Rate of 12%
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Tools/Techniques
RISK Tool by Palisade (Academic Version) on MS Excel.