A purchasing agents response for ordering hardware for a custom home home company building the contractor is selling the hardware schedule to start in five working days but the hardware is working fortunately the purchasing agent has 10 days a slack over he shares a slag with the hardware installer he'll have to let the contractor know that he will be ready in four days later than expected and slack for the installer has been reduced by four days the purchasing agent and the installer share 10 days of free slack total slack shared slack critical slacker functional slack