Gets complex. Easy bit is 'Last in, first out'. I joined a fast expanding company. Three years as a FO I was promoted. However, ahead of me were DEC's with less Company Service (one year). Redundancy hit us as the company downsized. I faced going back to RHS after 4 years company service but the DEC with only one year held his LHS. Actually, while I hated him , he saved me by leaving, not before the house went up for sale, kids were briefed on the State school system & one of the two cars went on the market! Ouch. Painful memories !