Ted, a senior employee, believes he is underpaid and attempts to compensate by routinely keeping short hours, though it is obvious to everyone that he still makes some valuable, unique, and perhaps irreplaceable contributions  Tatiana, Ted' s supervisor, is aware of the deficit in Ted' s performance, and realizes other workers work harder than they should to make up for it
Nevertheless, Tatiana decides that she should not request that Ted be replaced
Supervisors should request that an employee be replaced only if they know that all the work done by that employee can be performed equally well by another employee.