Project Delivery Methods
This is the most well-known and most used construction project delivery method and is broken down into three main sections.
This is a type of WBS in which activities are broken down into discipline-based steps that need to be completed in order for the activity to be successfully finalized. A Process-Based WBS allows the CPM to develop a more realistic project scope and demonstrates the relationship between activities and their steps.
What is a Process-Based WBS?
This is a PDM method in which activities cannot start before the previous activity is finished
What is Finish-Start?
The earliest time that an activity can start
This takes place when there are two or more activities happening concurrently such as those that take place during start-to-start and finish-to-finish activities.
What is the Total Float?
This method is similar to the D-B-B method in that a project is designed and built. However, this method combines the designer and contractor. Meaning that the Head Contractor is also the person who fully designs the schematics, drawings, and specifications for the project before the building phase takes place.
What is Design-Build (D-B)?
This is a WBS in which the activities are organized in terms of the specific deliverable components of the overall project.
What is a Deliverable-Based WBS?
This is a PDM method in which there is a defined relationship between the start of one activity and the end of the next activity.
What is Start-Finish?
The earliest time that an activity can be finished
What is Early-Finish (EF)?
Both of these equations can be used to calculate this kind of float.
LS-ES=
LF-EF=
What is a Total Float?
For this method, the owner or Project Developer will hire a Construction Project Manager who then becomes responsible for the overall completion of the project. The Construction Project Manager is responsible for all phases of the project including:
Design
Preconstruction
Contractor bidding/hiring
Construction/building
What is Construction Manager at Risk (CMAR)?
This is the first step towards developing a WBS.
What is Gathering Documents?
These are those dependencies that cannot be altered. For example, bricks cannot be laid down until cement has been prepared. There is a mandatory dependency that the cement must be prepared first.
What are Mandatory Dependencies?
A technique used by the CPM to determine the overall duration of all project activities and calculate the Early Start Time (ES) and Early Finish Time (EF) of each activity.
What is a Forward Pass?
This is the amount of time that an activity can be delayed without also delaying the early start date of the next activity in the sequence.
What is the Free Float?
This method integrates all major Construction Project Team Members who will then work together to design, develop, and build the construction project.
What is Integrated Project Delivery (IPD)?
This is the process of breaking down the Level One Elements into subcategories
What is Decomposition?
These are those dependencies that take place outside of the construction project such as government regulations.
What are External Dependencies?
A technique used by the CPM to determine the overall duration of all project activities and calculate the Late Finish Time (LF), and Late Start Time (LS) of each activity. The backward pass will also determine the project’s Critical path.
What is a Backward Pass?
Once the forward and backward passes have been completed and the critical path has been located, the CPM can calculate these.
What are the Total and Free Floats?
This consists of multiple projects being completed over the course of one overall project contract. In this case, the owner or Project Developer has multiple construction projects to complete over a specified period of time.
What is Job Order Contracting (JOC)?
This is the last step towards developing a WBS.
What is Creating a Project Schedule?
These are those dependencies that take place within the construction project based upon the activities. Though these are not mandatory dependencies, sometimes a member of the construction team cannot begin an activity until another activity within the project has been completed.
What are Internal Dependencies?
The longest sequence of activities completed in the shortest amount of time in which a project can be completed based upon the ES and LF of all activities.
What is the Critical Path?
This equation is used to calculate this type of float.
ES-EF=
What is the Free Float?