Iterative Development Meaning for Continuous Improvement

Technically speaking, iterative development meaning rests on a process of software refinement through loops. In practical terms, each iteration may be about:

• enhancing the usability of certain page elements, 
• removing friction in a checkout process or other user flows, 
• making the page load faster, etc. 

The goal of each iteration is to make each new version of the product better than the previous one. 

The iterative loops may consist of different actions depending on the methodology. For instance, the iterative loop in Lean Methodology is Build-Measure-Learn. And the goal is to test business hypotheses such as demand for the product overall or certain planned functionality, user satisfaction, etc. In Scrum, an iteration has a Plan-Design-Build-Test-Review structure and focuses on accomplishing acceptance criteria. Originally, the purest iterative development meaning was coined prior to these Agile methodologies (Lean, Scrum, and others). It was put forward as the core part of the Spiral Development Methodology.

For businesses, iterative development meaning is synonymous with MVPs, avoiding investment without results, and moving towards product-market fit. Essentially, for decision-makers and founders, iterative development is about speed to market and risk mitigation. According to IntelMarketResearch:

“Recent data indicates that over 70% of startups now leverage MVP frameworks before full product development, reducing initial costs by up to 45%while validating market fit. Large enterprises are similarly adopting MVP approaches to test innovations with minimal risk. The maturing startup ecosystem further amplifies this demand, with VC funding for early-stage tech companies exceeding $300 billion globally in recent years.”

MVP is an inherently iterative practice, and it is the driving engine of today’s digital economy. Continuous improvement through iterations is also a part of the operations of mature companies that often ship updates on an hourly basis. 

In this blog post, we’ll break down iterative development meaning in different methodologies and its value for continuous improvement.

Iterative Development Meaning & SDLC (Software Development Life Cycle)

All in all, SDLC describes the development process of making software from an idea to a finished app. Altogether, there are 4 major SDLC methodologies: Waterfall, Agile (Scrum, Lean, etc), Spiral (design thinking), and Staged (PRINCE2). 

Table: Waterfall, Agile, Spiral, & Staged 

In the table below, you can see where each methodology falls in relation to iterations and increments, as well as its main actions, scope planning, and value delivery. 

While iteration refers to continuous improvement, increment represents a finished feature that increases the value.

SDLC methodology	Iterative	Incremental	Activities	Scope	Value delivery
Waterfall	❌	❌	“Plan => Design => Development => Test => Deploy”, performed once	The first planning stage determines what the final app will look like.	The client sees the finished product at the end of the SDLC cycle, which can take anywhere between 6 months and 1.5-2 years.
Agile (Scrum, Lean, etc.)	✔️	✔️	“Build-Measure-Learn” in Lean	The client gives feedback weekly/bi-weekly, etc, and can change the scope frequently and dynamically.	Each increment is tied to a sprint that delivers user value. Each increment is a result of one or several iterations. The client sees value often.
Spiral (Design thinking)	✔️	❌	“Framing, Analysis, Idea Generation, Realization, and Reflection”	The client can see all the prototypes, give feedback, and make changes.	This approach often delivers a prototype or a model, solves complex problems, or searches for innovative solutions. The goal is to reach the right prototype that clients will love. Value is delivered with the final result.
Staged (PRINCE2)	❌	✔️	“Plan => Design => Development => Test => Deploy” once per stage	After the first increment completion, the scope for the next increment might be adjusted.	This approach delivers an app in stages. The client sees the value after each increment/stage.

Table: Continuous Improvement Depends on Frequency of Iterations and Increments

As shown above, we’ve used the word “client” to mean any stakeholders of your app. For the development agency, the client is the founder or appointed point of contact. Then, they review work in progress (WIP) and give feedback. They can also show the WIP to users for testing or user feedback. Finally, WIP can be shown to investors as proof of progress. 

As a result, all those points of feedback initiate certain revisions, may add or remove features, and essentially, change the scope. When there is only one such point of feedback as in Waterfall, the product development is removed from the market/user until the launch. In incremental & iterative methodologies, the points of feedback are more frequent. The earlier and the more frequently the product interacts with the market/user, the more chances there are to develop the product users truly want and need.  

SDLC Methodologies: The Power of Continuous Improvement

According to the words of Ash Maurya, author of Running Lean:

“Life’s too short to build something no one wants.”

In Waterfall, the team plans out the entire development, and those plans are generally very thorough,  containing the exact view of the final product. The team rarely deviates from this plan, and any change wreaks havoc, messing up deadlines and budget. However, today, the instances of the waterfall methodology are nonexistent. The market always moves faster, and the risk of releasing something that is already not relevant is too high to take. 

In sharp contrast, iterative development welcomes change, and the planning is rather brief. Consequently, in most cases, no one imagines the final product apart from an initial description of the kind of value it aims to deliver. And this too goes through refinement, clarification, and pivoting. The product takes shape throughout development based on the market/user feedback. 

While each SDLC methodology varies in terminology, the high-level difference is how often the development produces value and how flexible its scope is. In this regard, Agile methodologies are market leaders as they combine iterations and increments in their process of software development.

What is Iteration in the Lean Agile SDLC Methodology?

The Build-Measure-Learn (BML) loop was coined by Eric Reis in 2011. Lean iterations prioritize assumption testing. As you can see below, the main Build-Measure-Learn loop includes an inner one, implying that there can be as many iterations as necessary. Therefore, one increment can include multiple iterations akin to spiral development.

Lean iterative development enables the power of continuous improvement. Let’s look at the example to understand lean iterative development meaning. 

Lean Iterative Development Meaning: Marketplace Example

Let’s take the very first sprint. Before entering the Build-Measure-Learn loop, there is a ‘Plan’ action to decide which assumptions need to undergo testing. So, first, the founder decides what hypothesis to test first, and the development agency offers the smallest thing to build to test it. 

So, imagine building a marketplace for a variety of local services – cleaning, repairs, tutoring. There should have been some previous iterations in terms of landing page smoke tests, concierge MVP, and so on (discussed later). So, we have a confirmed demand for such a marketplace and start building out the app itself. As such, we choose a business assumption to test: 

• Hypothesis 1 (Sprint 1): Will providers start joining the marketplace?
• Hypothesis 2 (Sprint 1): Will clients start browsing the available services? 

The smallest thing to build? A simple one-page form to join, a basic account, and a list of services. Let’s put it into a BML loop.

Iteration 1

Build	Measure	Learn
– A basic profile with name, service category, and prices; – A one-page registration form; – A list of services for clients to browse; – A placeholder CTA to contact a provider. * (There are no functionalities like search, chat, filters, etc.)	The main point to measure is the service provider account completion rate. So: Do providers finish profiles or drop off? In addition, we check the client side: – Do clients click anything? – Do they scroll through the list of services? – Do they click the placeholder CTA button?	While the main metric is profile completion, we can also check the quality of filled-out profiles. For instance, a possible discovery can be that providers indicate prices in different formats: $20 per hour, $120 per job, or simply put ‘depends’ in the notes. Business outcome will come from measuring whether people even want to go through a list of services and click the CTA.

Iteration 2

In the way of continuous improvement, we might have time to do a second iteration in this sprint. The team can add providers’ emails into CTA. It’s a relatively small tweak, so it will take under a day. This BML loop for the inner iteration is as follows in the table below.

Build	Measure	Learn
Add email or WhatsApp contact to the ‘Request Contact’ CTA	The business goal is to check how many providers respond and how many conversations turn into transactions	Depending on the number of requests, the learning is the following: 1) Not enough requests => next iteration should work on listings 2) Many requests => conversations might be a bottleneck, so minimalist chat functionality should be the next increment

The business value is that from the very first sprint, there are opportunities to test:

• demand for the services, 
• how well the marketplace generates leads, and
• if transactions start happening. 

The power of continuous improvement lies in the ability to improve the very small things to make sure it is in demand and monetizes.

Early Lean Iterations: Where Continuous Improvement Starts

Moreover, professional lean Startup Services often offer to do cost-efficient iterations like:

• Iterating over value proposition through a simple one-page landing page and “Join Waitlist” – landing page smoke test;
• Testing the demand with a front-end and manual operations behind-the-scenes – Concierge MVP;
• Testing a feature through Wizard-Of-Oz Route – doing the functionality manually but presenting it as an automated feature to users;
• Testing the need for extra buttons, filters, etc through Fake-Door experiments – adding a filter placeholder with label ‘coming soon’ to see how many would click;
• Iterating to reach optimal pricing through price sensitivity experiments, etc.

Continuous improvement starts even before the functionality is implemented in Lean methodology. The idea is to build a product with which users will interact and want to pay for. The majority of iterations are driven by business outcomes, and as such, lean iterative development is the most business-efficient. 

Lean VS Scrum: Iterative Development Meaning

To briefly demonstrate the difference in iterative development meaning between Lean and Scrum, let’s use the same marketplace example. In Scrum, the iteration follows Plan – Design – Build – Test – Review stages. One iteration often coincides with one increment, as the results of the review often make it into the Backlog. Then, the selected backlog item makes it into the next increment.  Instead of choosing hypotheses, Scrum starts out with a sprint goal. For instance: “Implement provider listing and basic browsing”. 

Plan	Design	Build	Test	Review
Formulate Backlog Items for the sprint to achieve goal:  1. Profile for providers, 2. Service listing page, 3. DB structure, 4. Essential UI elements.	This stage usually combines wireframing in Figma or another design tool and defining acceptance criteria	This is the stage where developers implement backlog items to meet the acceptance criteria	Testers test the functionality to reveal any bugs and check against the acceptance criteria	This is where the increment is delivered to the client/founder, and they give their feedback.

As you can see, iterative development meaning in Scrum is driven by implementing a planned piece of functionality. The founder still gets the opportunity to gather business-level feedback, yet it is not as dynamic and business-feedback-driven as Lean is. Lean enables a startup to continuously improve throughout one sprint multiple times. So, the speed of iterating the value to meet the market requirements is often much faster. In addition, Scrum iterative development meaning evaluates the business efficiency of a feature after it has been shipped, while Lean emphasises pre-implementation demand testing.

Final Words: Why Continuous Improvement through Iterative Development Always Wins?

Agile SDLC methodologies are most popular because they are most flexible and responsive to the client’s needs, enabling continuous improvement. You can change the scope based on user testing, user feedback, investor requirements, new ideas, and whatnot. 

Moreover, lean iterative development meaning implies testing the market/user demand before actually completing features through many of its approaches. These approaches include fake-door experiments, landing page smoke tests, concierge MVPs, Wizard-Of-Oz implementations, and so on. This enables a startup to continuously improve to achieve product-market fit faster than other methodologies. 

FAQ: Iterative Development Meaning for Continuous Improvement