LIFO as fair as you can get as it does not use any means of personal discrimination. You could start looking at sim grades, sickness, helpfulness, punctuality and any number of subjective qualities, ultimately it will be what the union negotiates with the management. Redundancy is not fair, but LIFO is easy to understand and simple to administer although it will not be favoured by the company as it will probably incur retraining costs and they keep the ones they would like to be rid of.