What are the roles and responsibilities of relevant personnel in the construction industry?

A bricklayer—Responsibilities : Cutting bricks to size using hammers, chisel or power tools.—Responsibilities: laying the bricks in horizontal layers (courses).—Responsibilities: Measuring out the work area and laying the first courses according to the architect's plans.—Responsibilities: mixing mortar, either by hand or with a mixing machine.—Responsibilities :Spreading mortar evenly to fix the bricks into place.—Responsibilities: Ensuring that the line of the wall is totally straight and level. For this to spirit level or plumb line may be used.—Responsibilities: Making access holes in the wall to allow electricians, plumbers and other workers to bring water, electricity and commodities into the building