OM Builders Inc. is starting a brand-new development of 10 residential houses in an up and coming neighborhood. The previous housing development completed by OM Builders Inc. was its first development and experienced significant issues with town permits, scheduling, delayed shipments, incorrect furniture and equipment and meeting the closing date of homes. The owner of the firm has met with his management team to discuss how the company can ensure a more efficient, less error-prone project for this new development. The management team decided to use project management tools suggested by a recent graduate the firm hired from a Global Business Management college program. The objectives for the new development are to reduce the number of errors, ensure that schedules are prepared properly and followed and the completion of the project by the promised closing date. The company is currently negotiating with the current owners of the land to be developed and a deal is imminent. During the meeting, the management team put together the following list of activities and sub-activities for preparing the site for house construction.

Activity	Description	Predecessor	Time (weeks)
A	Purchase land	-	7
B	Obtain building permits	A	3
C	Hire Site Manager	A	3
D	Site Planning	B	5
E	Excavation of Land	D	6
F	Rent foundation digging equipment	E	4
G	Order concrete for foundations	F	2
H	Hire workers	B	4
I	Order site time clock	H	4
J	Hire subcontractors	I	10
K	Order mobile office for site	C	2
L	Order office furniture for mobile office	D, K	3
M	Install mobile office on site	L	8
N	Purchase computer equipment for site	C	6
O	Hire subcontractors for concrete pour	G, R	7
P	Order building materials (pre-made frames etc.)	B	20
Q	Final approval of city services	B	4
R	Pour concrete foundations	Q	4
S	Order windows and doors	R, X	3
T	Meet with town to discuss city services	A	4
U	Review and finalize house designs	T	6
V	Construct sales office	T	7
W	Hire sales people	V	4
X	Send house designs to printers	U	8
Y	Hire marketing firm	B	6
Z	Design house plans	Y	6

You have been hired as the project manager for this new development and the owner of the company has asked you to complete the following with the help of the recent graduate:

1. Draw a Gantt chart demonstrating all of the activities in the above chart.
2. Determine the critical path using an Activity-on-Node diagram.
3. Determine the total slack time.
4. Discuss the positive impact that project management can have on housing projects in order to convince the owner why project management should used for all future developments.