1. A method for determining the post-launch performance of a product on a market, comprising: storing, in a database, collected first data related to at least one key success factor associated with at least a market performance which is related to said product; storing, in a database, collected second data related to unmet product needs on said market; storing, in a database, collected third data related to a propensity of a decision-maker to choose said product; linking a computer to said databases; and using a simulation model on said computer to calculate a future market share of said product based on said collected first, second, and third data, thereby determining said post-launch performance on said market.