
Marginal analysis is a technique used in project management to assess whether the additional benefits of an activity are worth the additional costs. The comparison of additional benefits to additional costs is known as the benefit-cost ratio. The goal of marginal analysis is toย find the least cost or most benefitย option among a set of alternatives, and it can be expressed as Benefit-Cost = Net Benefit. When deciding whether to undertake an activity, managers should always consider the marginal benefits and marginal costs.ย
- The marginal benefits of an activity are the additional benefits that will be gained from undertaking the activity.
- The marginal costs of an activity are the additional costs that will be incurred from undertaking the activity.
So, in order to make a decision, managers should compare the marginal benefits of an activity to the marginal costs.ย If the marginal benefits are greater than the marginal costs, then the activity should be undertaken. If the marginal benefits are less than the marginal costs, then the activity should not be undertaken.ย Marginal analysis is a powerful tool that can be used toย make sound decisionsย about whether to undertake an activity.
When used correctly, it can help managers maximize the benefits of activity while minimizing costs. For example, marginal analysis is a powerful tool that can be used to assess a wide range of activities, from the purchase of new equipment to the introduction of a new product line. Meaning, where to focus efficiently with the use of resources. In this article, we will explain what marginal analysis is and how it can be used in project management. We will also provide some examples of its use.

Why Is Marginal Analysis Used?
Project managers use marginal analysis to determine the potential effect of a change on the project. For example, marginal analysis can be used to identify and assess the potential effect of a change to a project on its costs, schedule,ย risks, and performance.ย It is a powerful tool that can be used to make informed decisions about whether or not to proceed with a proposed change.ย
There are many benefits of using marginal analysis in project management. It can help project managers to:
- Understand the potential impact of a proposed change on the project
- Make informed decisions about whether or not to proceed with a proposed change
- Identify and assess risks associated with a proposed change
- Mitigate risks by implementing appropriate controls
If you are considering making a change to your project, then the marginal analysis is a tool that you should definitely use as it can help you to understand the potential impact of the change and make an informed decision about whether or not to proceed.
Examples Of Marginal Analysis
To understand marginal analysis, consider a few practical examples:
1. Coffee Shop Example
A coffee shop can use marginal analysis to evaluate the benefit of increasing production. The decision focuses on the additional revenue from selling more coffee versus the additional cost to produce it.
Net Benefit = Additional Benefits (revenue from extra coffees) โ Additional Costs (cost to make the extra coffees)
If the net benefit is positive, increasing production makes sense; if negative, it does not.
2. IT / Website Project Example
In IT, marginal analysis helps determine whether the incremental benefits of a proposed technology initiative justify its incremental costs. For instance, a company considering a new website should estimate the additional benefits (increased sales, improved customer service, better stakeholder communication) against the additional costs (development, hosting, maintenance, and rough-order-of-magnitude estimates).
By comparing the incremental benefits and incremental costs, the company can make an informed decision about proceeding with the project.
3. Financial Margins And Business Decisions
Margin refers to the amount remaining after a company pays its expenses. For example, if a business has $100 in revenue and $80 in expenses, the dollar margin is $20 and the margin percentage is 20%.
Companies use margin metrics to evaluate financial health and identify improvement opportunities. A high margin typically indicates effective cost control, while a declining margin may signal competitive pressure or operational problems.
Applying Marginal Analysis In Project Selection
Project managers use marginal analysis to decide which projects to pursue and how to allocate scarce resources. The process compares the incremental benefits and incremental costs of alternative courses of action to identify the option with the highest net benefit.
Simple Formula
Benefit โ Cost = Net Benefit
Use this formula to compare alternatives and select the option that maximizes net benefit.
Practical Note
When performing marginal analysis, include all relevant costs and benefits. Some items, such as reputational effects, strategic value, or future flexibility, can be hard to quantify but materially influence the decision. Carefully document assumptions and, where possible, run sensitivity checks to understand how robust the conclusion is to changes in key estimates.

Cost-Benefit Analysis Vs Marginal Analysisย
Cost-benefit analysis and marginal analysis are both tools that can be used to make economic decisions. They are similar in that they both seek to identify the best course of action by weighing the costs and benefits of each option. However, there are some key differences between the two.
Marginal Analysis | Cost Benefit Analysis |
---|---|
Marginal analysis, on the other hand, looks at the additional benefits and costs of a course of action and decides whether or not the additional benefits are worth the additional costs. | Cost-benefit analysis weighs the costs and benefits of a course of action and chooses the option that leads to the greatest net benefit. |
The marginal analysis only looks at the incremental costs and benefits. This means that marginal analysis is more focused on the immediate costs and benefits | The cost-benefit analysis looks at the total costs and benefits of a course of action while it takes a more long-term view. |
Another key difference is that Marginal Analysis does not assign a monetary value to each cost which is way simpler. | Cost-benefit analysis assigns a monetary value to each cost and benefit, making it more accurate but also complex |
Maximizing Marginal Benefit
In order to maximize marginal benefit, it is important to understand the needs of the customer and the goals of the project.ย By understanding these factors, you can better tailor the project to meet the needs of the customer and the expectations of the project.ย With a clear understanding of the customer and the project, you can easily identify ways to increase marginal benefit.
There are many ways to increase marginal benefit in project management.
- One way is to optimize processes and procedures to ensure that the project isย completed on timeย and within budget.ย
- Another way is to focus onย quality controlย to ensure that the final product meets or exceeds customer expectations.
- The next one can be by focusing on value-added activities that will have the greatest impact on the projectโs success and be critical of it. Ask yourself if you can go beyond the standard.
- And finally, project managers can also work toย improve communicationย and collaboration with proper feedback and understanding of the needs among team members, so that everyone is working towards the same goal efficiently.
By following these tips, project managers can increase the chances of success for their projects and, as a result, increase the chances of meeting their project completion goals.
FAQs
What is marginal analysis in project management?
In project management, marginal analysis is the process of quantifying the benefits and costs associated with an activity in order to make a comparison.
Why is marginal analysis important for project managers?
It is a technique that is used to quantify the benefits and costs of a project change. Marginal analysis can be used to assess the impact of a change on the project budget, schedule, scope, or quality. It is a valuable tool that can help project managers make informed decisions about how to best allocate resources.
What is the formula of marginal analysis in project management?
The basic marginal analysis formula can be expressed as Benefit-Cost = Net Benefit
What are the key differences between marginal analysis and cost-benefit analysis?
Marginal analysis is a method of decision-making that focuses on the incremental changes that will result from a decision. In other words, it looks at the marginal costs and benefits of a project. Cost-benefit analysis, on the other hand, looks at the total costs and benefits of a project.
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Shane Drumm, holding certifications in PMPยฎ, PMI-ACPยฎ, CSM, and LPM, is the author behind numerous articles featured here. Hailing from County Cork, Ireland, his expertise lies in implementing Agile methodologies with geographically dispersed teams for software development projects. In his leisure, he dedicates time to web development and Ironman triathlon training. Find out more about Shane on shanedrumm.com and please reach out and connect with Shane on LinkedIn.