Repeat by working the next column until you have completed all columns. Hire a new employee. Some of the columns will require much discussion, as choosing an arbitrary number will not be that easy in some cases. Often, you will have a couple of ideas that tie, but having it diagramed out in a matrix makes it much easier to make a decision. Members of the groups are selected because the are experts or they have relevant information.
Members then make another decision based upon the new information.
The process may be repeated until the the responses converge satisfactory. The success of this process depends upon the member's expertise and communication skill. Also, each response requires adequate time for reflection and analysis. Efficient use of expert's time. Diversity of ideals.