Men today are no longer subjected to the rigid dress code of formal dressing today as they used to be in the past unless they belong to a customer facing profession. Having said that, it is still important for men to still dress professionally when they go in to work. This is very vital to establish in the first place, because men as a rule do not know where to draw the line between smart casual and sloppy casuals.
The best way to ensure that this does not happen, is by ensuring that there are some firm ground rules to be followed. These rules need to cover everything from top down right to the feet.