What do you think about Deva’s approach to scheduling work and estimating the costs?

Deva Patel, project manager at Startrek Enterprises, Inc., is planning and coordinating the company’s move to a new building currently under construction. Deva wants the move to commence as soon as the building is ready for the estimated June 1 occupancy—still 2 months away. The entire move, which will affect four departments and 600 people, is to be completed within 1 week.
Because timing is critical, Deva starts her planning by preparing a Gantt chart. At the project level, she draws a bar 1 week (7 days) long, then subdivides it into three major categories: (1) pack office supplies, equipment, and furniture (3 days allotted); (2) move everything (2 days allotted); and (3) unpack and arrange it at new location (2 days). She then estimates the total number of boxes, equipment, and furniture that will have to be moved in 2 days, gives the estimate to a moving contractor, and receives a price quote. To assist in packing and unpacking boxes and equipment, Deva intends to hire temporary workers. She estimates the number of workers needed, gives it to a temp agency, and receives a price quote.