$6-$ Abdulaziz is the founder of a group of restaurants specialized in sea food. The group consists of $20$ branches. Because Abdulaziz is currently busy in pursing his Bachelor degree at Alasala, he needs to make a shift in the organizational structure $"$to be loose" where the branch managers can plan and decide without the need of consulting the headquarter. What kind of organizational structure should he follow? And what kind of decision$-$making process should Abdulaziz follow? State the reason.