This is a Multi Zone Temperature Control panel used in Plastic Extrusion Moulding. Building such panels helps us learn cable management techniques.
The panel is a standard way it was built and some of the merits were the selection of panel components and wiring expertise.
Just like rackmounts hold big instruments or computers, control panels small or big have to hold DIN Instruments, switches and annunciators to make it easy for the operator. The maintenance work also is simple from the backside. It can be kept near the machinery which it controls.