The most common type of union grievance reaching arbitration involves ____________.

A) discipline and discharge
B) allocation of overtime
C) allocation of shift work
D) safety and health
E) improper promotions

Discipline and discharge are the most common types of union grievances that reach arbitration. Many collective bargaining agreements include specific procedures for disciplinary actions and terminations, which can result in grievances and ultimately arbitration if the union believes the discipline or discharge was unwarranted or unfair.