They should be experienced personnel within the brigade, and they provide an opportunity for brigades to establish a line of middle management or succession planning.
They invented the concept of middle management, set up career paths for promotion of aspiring employees, and established uniform bureaucratic rules for hiring, seniority, firing, promotions, wage rates and benefits.
By elevating the level of responsibility of baseline employees and eliminating layers of middle management, comments and feedback reach all personnel involved in decisions more quickly.
Operational supervisors may be considered middle management or may be categorized as non-management staff, depending upon the policy of the particular organization.