Answer: Competent, reliable, and ethical personnel.
Step-by-step explanation:
Vaughan Services needs to follow competent, reliable and ethical personnel procedure to addressed this type of situation.
Competent characteristic tell us about the employee skills, knowledge and capability or ability of doing some work successfully.
Reliable characteristic tell us about the employee performance, quality and trustworthy or not.
Ethical personnel tells us about the employee's behavior towards the other people, responsibilities towards work and how much he is committed towards work.