Assignment 3

Construction of a Residential Complex Using the Activity-on-Node (AON) Method

Company Y is a construction company that has been awarded a contract to build a residential complex. They aim to efficiently manage the project using the Activity-on-Node (AON) method in their Critical Path Method (CPM) analysis. The project involves multiple activities with interdependencies and strict timelines.

Project Details:

• Construction of a residential complex comprising three apartment buildings
• Key deliverables include site preparation, foundation construction, building erection, interior work, and landscaping
• Project duration: 12 months

Activity-on-Node (AON) Diagram:

yaml

A: Site Preparation

/ \

/ \

B: Foundation C: Building Erection

Construction

\ /

\ /

D: Interior Work

|

E: Landscaping

Activity Descriptions and Duration Estimates:

A: Site Preparation (4 weeks)

• Clear the site and prepare it for construction activities
• Tasks: Clearing vegetation, leveling the ground, establishing temporary facilities

B: Foundation Construction (10 weeks)

• Build the foundations for the apartment buildings
• Tasks: Excavation, pouring concrete, reinforcing structures

C: Building Erection (18 weeks)

• Construct the apartment buildings
• Tasks: Structural framing, roofing, exterior finishing

D: Interior Work (20 weeks)

• Complete the interior work of the apartments
• Tasks: Plumbing, electrical installations, flooring, painting

E: Landscaping (6 weeks)

• Complete the outdoor landscaping and beautification
• Tasks: Planting trees, laying pathways, installing outdoor amenities

Project Constraints:

• Building permits must be obtained before commencing construction activities.
• Availability of construction materials and equipment must be considered for timely execution.
• Construction work should adhere to local building codes and regulations.

AON Method Analysis:

• Determine the dependencies and sequence of activities based on the AON diagram.
• Calculate the earliest start time (ES), earliest finish time (EF), latest start time (LS), latest finish time (LF), and total float for each activity.
• Identify the critical path, which consists of activities with zero total float and determines the project's minimum duration.