The 4-day week is a great idea, and can probably work well in most vertically-integrated businesses. Ironically, it's probably most suitable for manufacturing

The 4-day week is a great idea, and can probably work well in most vertically-integrated businesses. Ironically, it's probably most suitable for manufacturing work, especially if you're building to stock and not to order. But if you have a lot of external dependencies, and need to interface with suppliers and customers on a regular basis, a 4-day workweek can really into the amount of time you have available to do so.