If we add a number to the tasks, label each activity and determine its predecessor, and add the duration to each activity and the owner, the WBS becomes:

Level 1	Level 2	Level 3	Activity	Duration (Days)	Predecessor	Owner
1 Electronic Health Record (EHR)	1.1 Patient Information Management (PIM) Module	1.1.1 Admission, Discharge, and Transfer Module	A	22	-	PIM Team
1.1.2 Registration Module	B	22	A
1.1.3 Master Patient Index	C	23	B
1.1.4 Patient Scheduling Module	D	22	C
1.2 Clinical Information System (CIS)	1.2.1 Clinical Alert System	E	20	-	CIS Team
1.2.2 Clinical Rules Engine	F	25	E
1.2.3 Consult Tracking Module	G	10	F
1.2.4 Order Management System	H	12	G
1.2.5 Results Reporting System	I	19	H
1.2.6 Computerized Provider Order Entry Module	J	17	I
1.2.7 Patient Intake/Output Module	K	19	J
1.3 Laboratory Module	1.3.1 Anatomic Pathology Reporting Module	L	12	D	Lab Team
1.3.2 Microbiology Reporting Module	M	13	L
1.3.3 Chemistry Reporting Module	N	15	M
1.4Radiology Module	1.4.1X-Ray reporting Module	O	10	D	Rad Team
1.4.2 Ultrasound Reporting Module	P	10	O
1.4.3CT scan Reporting Module	Q	11	P
1.4.4MRI reporting Module	R	10	Q
1.5 Pharmacy Module	1.5.1 Electronic Medication Administration Record	S	8	N,R
1.5.2 Bar Code Medication Administration	T	8	S
1.5.3 Pharmacy Inpatient/Outpatient Information System	U	8	T

1. Create the WBS using Microsoft Project.
2. Draw the Gantt chart diagram.
3. Note that the above lists, though extremely useful, are difficult to comprehend instantly. This is because the brain does not handle large quantities of information well. On the other hand, the brain does deal very well with images. This is the main reason that network diagrams are worth developing and are so commonly used. They present a graphical view of the project that we can easily comprehend. If we graphically show all this information, we could construct an Activity-On-Node Diagram.
4. Draw the network (Activity-On-Node) diagram.
5. Calculate the ES, EF, LS, LF, and S for each activity.
6. Find the project's critical path.
7. Find the project's critical time.