Project Planning & Scheduling

Finish to Start Lag

Finish-to-Start Lag: Ensuring Seamless Transitions in Oil & Gas Projects

In the complex world of Oil & Gas projects, where intricate tasks and tight deadlines reign supreme, effective scheduling is paramount. One crucial element contributing to successful project execution is the concept of Finish-to-Start Lag, a specialized term used in project management, particularly within the Oil & Gas industry.

What is Finish-to-Start Lag?

Finish-to-Start Lag refers to the minimum amount of time that must elapse between the completion of one activity and the commencement of its subsequent activities. It acts as a buffer, ensuring necessary preparations, resource allocation, or other essential steps are completed before proceeding to the next phase.

Understanding the Basics:

  • Default: The default Finish-to-Start Lag is zero. This implies that the next activity can start immediately upon completion of the preceding task, assuming no dependencies or logistical constraints.
  • Calculation: The lag is calculated during the project scheduling process, taking into account factors like resource availability, material procurement, and regulatory approvals.
  • Other Lag Types: In most cases, Finish-to-Start lags are not combined with other lag types, such as Start-to-Start or Finish-to-Finish lags, to avoid complications and maintain a clear scheduling framework.

Practical Examples in Oil & Gas:

Consider a typical Oil & Gas project involving drilling operations:

  • Activity 1: Drilling Completion - This task includes finalizing the wellbore and running casing.
  • Activity 2: Well Testing - This activity involves assessing the well's productivity and fluid properties.

In this scenario, a Finish-to-Start lag might be introduced between Activity 1 and Activity 2. This lag would ensure that the well is adequately prepared for testing, including:

  • Equipment setup: Time is needed to mobilize testing equipment and personnel.
  • Fluid sampling: The well may require time for fluids to settle and stabilize before accurate sampling.
  • Safety checks: A thorough inspection of the well and its equipment is essential before testing begins.

Benefits of Utilizing Finish-to-Start Lag:

  • Enhanced Efficiency: By incorporating appropriate lags, projects can avoid unnecessary delays and ensure a smooth flow of work.
  • Improved Resource Management: Lags allow for effective allocation of resources, preventing conflicts and ensuring the right personnel and equipment are available when needed.
  • Mitigated Risks: By factoring in potential delays, the project schedule can better account for unforeseen circumstances and mitigate risks of project failure.

Conclusion:

Finish-to-Start Lag is a vital tool in the Oil & Gas industry, ensuring efficient and successful project execution. By carefully considering the necessary time intervals between activities, project managers can optimize workflows, streamline operations, and ultimately achieve project objectives. As the industry continues to evolve and demand ever-greater efficiency, understanding and effectively utilizing Finish-to-Start Lag will become increasingly crucial for achieving project success.


Test Your Knowledge

Finish-to-Start Lag Quiz:

Instructions: Choose the best answer for each question.

1. What is the primary purpose of a Finish-to-Start Lag in project scheduling?

a) To reduce the overall project duration. b) To ensure a smooth transition between project activities. c) To increase the project budget. d) To reduce the number of project resources needed.

Answer

b) To ensure a smooth transition between project activities.

2. What is the default value for Finish-to-Start Lag?

a) 1 day b) 1 week c) 0 d) It varies depending on the project.

Answer

c) 0

3. In a typical oil & gas project, which of these scenarios would NOT benefit from a Finish-to-Start Lag?

a) Waiting for drilling equipment to be mobilized after wellbore completion. b) Allowing time for cement to cure before well testing. c) Starting the next well drilling immediately after finishing the previous one. d) Waiting for regulatory approvals for the next stage of the project.

Answer

c) Starting the next well drilling immediately after finishing the previous one.

4. Which of the following is NOT a benefit of using Finish-to-Start Lags in Oil & Gas projects?

a) Improved communication between project teams. b) Enhanced resource management. c) Reduced project risk. d) Increased project efficiency.

Answer

a) Improved communication between project teams.

5. In a project involving pipeline construction, a Finish-to-Start Lag would be most likely applied between which two activities?

a) Pipeline welding and pipeline coating. b) Site preparation and pipeline installation. c) Pipeline installation and pipeline testing. d) Pipeline testing and pipeline commissioning.

Answer

c) Pipeline installation and pipeline testing.

Finish-to-Start Lag Exercise:

Scenario: You are managing a project to install a new gas processing plant. The project involves the following activities:

  1. Site Preparation: Clear the site and prepare the foundation.
  2. Equipment Delivery: Deliver and unload the processing equipment.
  3. Equipment Installation: Install the processing equipment.
  4. Piping Installation: Install all necessary piping and connections.
  5. Electrical Installation: Install electrical wiring and controls.
  6. Testing and Commissioning: Test and commission the entire plant.

Task: Identify at least two activities where a Finish-to-Start Lag would be beneficial and explain why.

Exercice Correction

Here are two examples of activities that could benefit from a Finish-to-Start Lag:

  • Between Equipment Delivery and Equipment Installation: A lag is needed to allow for inspections, safety checks, and potentially some assembly or preparation before installing the equipment. This ensures the equipment is ready for installation and minimizes delays during the process.
  • Between Piping Installation and Electrical Installation: This lag allows for proper coordination between the piping and electrical teams. It allows for the electrical team to be ready with wiring and control systems once the piping is complete, preventing potential conflicts and delays.

Other potential activities that could benefit from a Finish-to-Start Lag include between Site Preparation and Equipment Delivery, or between Equipment Installation and Piping Installation.


Books

  • Project Management Institute (PMI). (2021). A Guide to the Project Management Body of Knowledge (PMBOK® Guide) (7th ed.). PMI Publishing.
    • This comprehensive guide covers all aspects of project management, including scheduling and dependencies, making it a valuable resource for understanding Finish-to-Start Lag.
  • Meredith, J. R., & Mantel, S. J. (2018). Project Management: A Managerial Approach (10th ed.). John Wiley & Sons.
    • This textbook provides a detailed explanation of project scheduling techniques, including various lag types and their application in different project contexts.
  • Cleland, D. I., & Gareis, R. (2018). Project Management: Strategic Design and Implementation (6th ed.). McGraw-Hill Education.
    • This book focuses on the strategic aspects of project management, with a dedicated chapter on project scheduling and the use of lags to optimize project timelines.

Articles

  • "Understanding Project Lags: A Comprehensive Guide" by ProjectManager.com.
    • This article provides a clear and concise explanation of different lag types, including Finish-to-Start Lag, with illustrative examples.
  • "Finish-to-Start Lag in Oil & Gas Projects: A Case Study" by [Author Name].
    • This article provides a practical example of how Finish-to-Start Lag is used in a specific oil & gas project to enhance project efficiency.

Online Resources

  • Project Management Institute (PMI) website: https://www.pmi.org/
    • The PMI website offers various resources and publications on project management, including articles, webinars, and training materials related to scheduling and lag types.
  • ProjectManager.com: https://www.projectmanager.com/
    • This website provides a wealth of information on project management techniques, including articles and tutorials on scheduling, dependencies, and different lag types.

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Drilling & Well CompletionAsset Integrity ManagementCommunication & ReportingProject Planning & SchedulingInstrumentation & Control EngineeringProcess EngineeringData Management & AnalyticsFunctional TestingMechanical Engineering
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