1. A method for setting up an access level for use of a software system comprising different levels of user accesses, the method comprising the steps of: using a first user login for a first user to log in to the software system, the first user login having a first access level comprising a first set of permissions for control of the software system, using a second user login for a second user to log in to the software system, the second user login having a second access level comprising a second set of permissions for control of the software system, combining the permissions of the first set of permissions and the second set of permissions in the software system, thereby setting up the access level for the use of the software system, the access level comprising the combined permissions of the first set of permissions and the second set of permissions allowing the first and second users to access programs or retrieve information from the control system with their respective sets of permissions now available simultaneously, wherein the software system comprises a control system for controlling a power plant, each permission in the first and second sets of permissions controls an operation of the control system for controlling the power plant, the access levels of each permission comprising read only and alter, and a first work task using the control system for controlling the power plant requires a permission that is in the first set of permissions but is not in the second set of permissions, and a second work task using the control system for controlling the power plant requires a permission that is in the second set of permissions but is not in the first set of permissions, the first and second work tasks able to be performed simultaneously to control the power plant using the combined permissions.