Hi Azar,
Monte Carlo simulation may be useful for strategic decisions but is rarely used for many reasons that include:
1) It is time consuming and requires a lot of input data,
2) Existing Monte Carlo simulation tools are not perfect,
3) The quality of input information is always low.
So the results of Monte Carlo simulation using current tools and approaches shall be considered as very rough estimates.
But estimating necessary contingency reserves and realistic time and cost is necessary and Monte Carlo is one of potential approaches to reciving these estimates.
We use different approach that is not that time consuming and can be done fast. This approach is a part of Success Driven Project Management methodology. Many publications on SDPM may be found at http://www.spiderproject.ru/publ_e.php#eng
SDPM is used not only for strategic decisions nut also for regular project management.
I am sure that strategic decisions shall always be based on risk analysis. So some tools for risk simulation and obtaining realistic estimates shall be used.
Best Regards,
Vladimir