[9] The Company sought the complete removal of a role for seniority other than as a criterion of last resort for the selection between employees when all other factors were equal. I have not embraced that position. Rather, I have come to the view that, in circumstances where employees have had the benefit of the protection afforded by a fairly strict seniority rule, the objects in s.3 and the criteria in s.275, and an outcome that is fair and just, is best served by removing seniority as the primary criterion for selecting employees for involuntary redundancy while retaining a substantive role for it in an involuntary redundancy selection process. In my view, at the end of the day, merit should be the key criterion but with material weight given to seniority. Clause 39.6 has been designed to ensure that "material" weight is given to seniority. What is "material" will depend on the circumstances but is intended to mean that a weight is attached to length of service that is qualitatively greater than simply using seniority as a way of splitting people, all other things being equal. The weight attached to seniority will vary depending upon the periods of service among the affected group. Greater weight must be given to a long period of service when measured against an employee with a short period of service. Where two employees each have similar periods of service, the weight to be attached to length of service as a criterion for distinguishing between the two employees will be relatively small.