One of the main questions about Story Points is what is their accuracy. Has any research or survey been performed to analyse their precision?
For example what is the accuracy of the completion date estimation based on Story Points.
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I know of at least two
Effort Estimation in Agile Software Development using StoryPoints gives a good overview of the story points accuracy: The cone of uncertainty is inherent to estimation.
For improving the estimation accuracy, various optimization techniques have been proposed. The Support Vector Regression (SVR) is one of these techniques that helps in getting optimal estimated values and the following article explains the theory in a thorough manner.
Also, to improve the accuracy of effort estimation, this article proposes a model for agile software development project prediction using Bayesian networks.
Mike Cohn has invested a lot of time researching the subject of Story points. You may also look into the following articles: