A Conceptual Model to Optimize Operating Cost of Passenger Ships in Macau

Table 5

The definition of variable and symbol of PS crews.

The total number of PS crews
The number of full-time crews	Working hours	The number; of part-time; crews	Working hours
	9:00–21:00		6:00–12:00
			7:00–13:00
			8:00–14:00
			9:00–15:00
			10:00–16:00
			11:00–17:00
			12:00–18:00
			13:00–19:00
			14:00–20:00
			15:00–21:00
			16:00–22:00
			17:00–23:00
			18:00–24:00