I work for a company that produce graphic assets and media for the video game industry. We are discussing a project with a client and we need to know how many man/days we can allocate in a given time span. For example 3 months.
That is quite easy as long we rule out the weekends and the bank holidays but we would like that the estimation reflects also the uncertainty of possible issues such as sickness or last minute leaves that will impact the man/days budget.
The question is: is there a formula or a method to calculate which is a reliable and effective amount of man/days per month or per a given time span? OR do we have assume the uncertainty as our own risk and give an estimation based on the actual working days multiplied by the available employees?
Thanks for the support and the kind help. I wish to all of you a great day.