I am studying for my PMP exam and would like to clarify above topic. Some would explain the difference between the 2 is iterative means delivering MVP and then better it progressively while incremental means deliver in parts which implies not MVP (e.g. you cannot use the car if only the steering wheel is ready).
However, SCRUM will use the term incremental delivery to mean delivering something useable every sprint, which makes the meaning of iterative and incremental interchangeable.
But having done some PMP practice exam questions, almost every time a question on Approach is present, the options for answer will contain Hybrid, Agile, Iterative and Incremental. Other than isn't iterative same as incremental, doesn't Agile already mean either iterative or incremental or both?
And if incremental isn't iterative, then what approach uses incremental?
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Agile combines iterative & incremental approaches. Iterative is sometimes interpreted as breaking up the work across time boxes but doesn't imply incremental which is a progressive elaboration of a product, service or result.
Senior Projects Manager | Field & Marten AssociatesNew Westminster, British Columbia, Canada
Here is how I look at it:
Iterative, is the development though repeated cycles allowing for refinement and improvement based on feedback received.
Incremental: Breaking down the project into smaller parts with each part building on the last.
In other words, an iterative process focuses on refining and improving through cycles, while an incremental process focuses on adding new components in stages and gradually enhancing functionality! Saving Changes...
Rami is mostly correct IMHO. Iterate means do do repeatedly. In math and structured processes, that typically means a process loop. For example Demming's "Plan Do Study Act" is shown as a loop indicating that the improvement cycle continues over time. If you take the output of a formula in math and use it as an input to the same formula, each time is one iteration.
Incremental may mean adding additional scope or breaking things up into discrete pieces like the old saying, "How do you eat an entire elephant? Answer: One bite at a time." Saving Changes...
Great question! Iterative improves a product step by step (MVP first, then refining), while incremental delivers in parts (usable pieces each time). Agile can be both. Scrum's "incremental" means each sprint delivers value. In PMP terms, iterative and incremental are distinct approaches. Saving Changes...
Incremental = Adding completed parts step by step (For example, when you're making a sculpture, and add the different body parts, created separately)
Iterative = Refining the whole work repeatedly (For example, when you have painted a whole picture on a canvas, and then you're enhancing this entire painting adding texture layers, luminosity effects, etc) Saving Changes...
Yasir MehaisiProject Engineer | GS Agent| HyperSpace ArabiaRiyadh, Saudi Arabia
Great explanation! But for the purposes of passing the exam, always look for the best answer based on the scenario presented. You may consider the following:
1. If the question asks about general adaptation, the answer is Agile.
2. If it asks about refining over sprints, the answer is iterative./div
3. If it asks about delivering part of the project in each sprint, the answer is incremental.
As you can see, the Agile answer is correct for all scenarios above, but it is not the best answer for 2 and 3. Saving Changes...
I see the differences as below:
1. Incremental would make sense when the requirements are clearly defined, so stakeholders would love to see functional but complete increments (ex., an ecommerce website can be delivered as first increment around - product catalogue & checkout; 2nd increment could include tracking).
2. Iterative would be suited when the requirements are unclear but stakeholders would like to refine their ideas/expectations (ex., an ecommerce website could be delivered as a first iteration of wireframes/prototypes & 2nd iteration could be the web app). Saving Changes...
Luis BrancoCEO| Business Insight, Consultores de Gestão, LdªCarcavelos, Lisboa, Portugal
Great question — and you're definitely not alone in this confusion!
Many PMP candidates run into this, especially with how terms are used in Agile vs.PMI exam language.
Let’s break it down clearly:
- Iterative: This is about refining the solution through repeated cycles.
You might start with something that’s not yet usable, but you improve it with each iteration based on feedback.
It’s useful when you don’t know the full solution up front, like designing a complex algorithm or UI concept.
Incremental: This is about delivering fully functional parts of the solution, step by step.
Each increment is usable on its own and adds value.
It works well when you do know what the end product should look like, but you can deliver it piece by piece — like building one module at a time.
Agile combines both**: it’s iterative because teams adapt based on feedback, and it’s incremental because each Sprint delivers a working piece of the product.
That’s why the phrase "iterative and incremental" is often used together in Agile contexts.
Agile is a broad umbrella. It includes iterative-only, incremental-only, or combined approaches.
But in the PMP exam, the options like Agile, Iterative, Incremental, Hybrid are treated as distinct approaches to test your conceptual understanding.
Example breakdown (from a PMP perspective):
Iterative: Think of evolving designs — wireframes → mockups → prototype → product.
Incremental: Delivering working features one at a time — login module, then search, then checkout.
Agile: Combines both — refine and deliver working features frequently.
Hybrid: Mix of predictive (e.g., detailed up-front planning) and adaptive (e.g., Agile delivery).
So while in real-world Agile they blur together, for the PMP exam, treat each term distinctly.
That nuance can make the difference in picking the right answer!
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