1. A computer aided method for computing accounting savings for a business related investment of one target product, said target product and at least one current product used in the business having at least one feature, the business comprising at least one business related activity, said method comprising: reading for each product the at least one feature; reading the at least one business related activity; reading an entry, by a user, of the target product; identifying feature-activity pairs related to the target product and the current product among predetermined feature-activity pairs associated with products; reading and summing predetermined values of savings associated with each identified feature-activity pair related to the target product to obtain a sum; reading and subtracting from the obtained sum predetermined values of the savings associated with each identified feature-activity pair related to the target product to compute a value of savings; and providing the computed value of savings to the user.