Agile vs Waterfall Scope Time and Cost Triangle

softwarebuck April 25, 2021 0 Comments



Waterfall – The Pioneer of SDLC Processes


Waterfall method exemplifies a typical sequential model, where the softwaredevelopment lifecycle is divided into different phases, each phase having itsown tasks and objectives. Often called the first most-widely used projectmanagement methodology in the software industry, waterfall was initially usedin the manufacturing and construction industry. So it won’t be wrong tounderstand this model in the context of a manufacturing line. Just as it is inthe case of a typical assembly line in manufacturing, the output of one phasein the waterfall software development model becomes the input of second phase.It is mandatory that the first phase is completed with perfection before youmove on the next phase because overlapping is typically impossible in thismethodology. This means, if you wish to make a change in the proposed productfeature much later in the implementation phase, there is a lot of reworkrequired. While waterfall certainly qualifies as a precise and well-definedmethod, with a need to think through and describe all the requirementsupfront, this in fact is a major drawback of the methodology. Reason being, itis simply impossible for someone to define all requirements upfront. This isprobably why, after the big Visual Studio doom, even Microsoft decided to doaway with their waterfall-like development methodology.

Agile Software methodology – The Iterative Approach


Agile is a development method that is quick and responds swiftly to change. Itis an iterative approach to software development where variables likerequirements, designing, building, testing etc. run parallel to each other, insmaller timeframes called Sprints. In Agile software development methodology,project requirements are not defined upfront, but evolve naturally throughcollaboration with clients.With the Agile method, the project is broken into small tasks that do notrequire a lot of planning. The time frame for iterations is also small,typically between one and four weeks. At the end of each iteration, theproduct is presented to the clients. As a result, the risk is minimum and theproject can adapt to any change in requirements quickly. The feedback loop isvery short. As a result, any issues can be addressed immediately. The lines ofcommunication between clients, the development team and the testing team areopen, which leads to increased efficiency.If you are looking for a project management methodology, which has an easylearning curve and can help your team improve and grow in a collaborativeenvironment, Agile is the answer. As more and more enterprises work towardsdeploying cloud based services to render the best IT experience, and the focusshifts to quality and productivity, adopting agile methodology for softwaredevelopment is certainly a step in the right direction. According to the 2015CHAOS Report by Standish Group, the success rate of Agile projects was 39% ascompared to only 11% in case of Waterfall. While introducing Agile into yourorganization might seem challenging in the initial stages, but the effort istotally worth it. Practicing Agile introduces elements like continuous qualityimprovement and cost-effectiveness into your system, which making it a perfectalternative to the traditional waterfall methodology.

Agile Approaches


Agile is derived using Lean thinking that applies “Lean” concepts in theinformation technology environment. The key focus of the Lean approach is to: * Eliminate waste from processes * Minimize Business non-value added activities * Maximize added value from the consumer’s perspectiveAgile ApproachesAgile approach is the proven project management methodology that encouragesthe following key concepts: * Frequent inspection and adaptation * A leadership philosophy that encourages team work, self-organization, and accountability * A set of engineering best practices that allow for rapid delivery of high-quality projects * A business approach that aligns development with customer needs and company goals

Agile vs Waterfall – Scope, Time and Cost Triangle


The Waterfall Method’s greatest strengths are its fixed costs andpredictability. You know the price, and when it is going to be delivered. Itsmost significant weakness is its inflexibility. The Agile Method is extremelyflexible and could evolve into a significantly different product than wasoriginally envisioned.Agile vs WaterfallTraditional waterfall approach is built upon the basis of the tripleconstraints of time, cost and scope. Adjusting any of those variables forces achange in at least one of the others. Delivering a successful project isdependent on balancing these three competing variables. But as we know simplyadding resources to a project doesn’t always bring about the desired goals. Asa matter of fact, if resources are added late on a software project, itactually has an adverse effect.Agile Approach takes a different approach by turning the triple constraintsupside down. Rather than viewing scope as fixed at the start, agile approachsets time (iterations) and cost (team members) as fixed; scope is thenadjusted to focus on the highest priorities. Agile is built with theexpectation that scope will evolve over time. The goal is to deliver theclient’s most important requirements within the budgeted cost and time. Agileallows for new requirements or re-prioritization as the project moves forward.Agile vs Waterfall quality

The Agile Approach Umbrella


Since the birth of the Agile Manifesto in 2001, there has much buzz aroundbeing agile. In fact, Agile approach is just a way of thinking that enablesteams and organizations to innovate, quickly respond to changing demand, whilemitigating risk. Organizations can be agile using many of the availableframeworks available such as Scrum, Kanban, Lean, XP and etc….Scrum agile umbrella

Lean Approach


A lean organization understands customer value and focuses its key processesto continuously increase it. The ultimate goal is to provide perfect value tothe customer through a perfect value creation process that has zero waste.5 Step Lean ApproachThe five-step thought process for guiding the implementation of lean approachis easy to remember, but not always easy to achieve: 1. Specify value from the standpoint of the end customer by product family. 2. Identify all the steps in the value stream for each product family, eliminating whenever possible those steps that do not create value. 3. Make the value-creating steps occur in tight sequence so the product will flow smoothly toward the customer. 4. As flow is introduced, let customers pull value from the next upstream activity. 5. As value is specified, value streams are identified, wasted steps are removed, and flow and pull are introduced, begin the process again and continue it until a state of perfection is reached in which perfect value is created with no waste.5 steps Lean Approach

Scrum Approach


Scrum is an agile way to manage a project, usually software development. Agilesoftware development with Scrum is often perceived as a methodology; butrather than viewing Scrum as methodology, think of it as a framework formanaging a process.Scrum Process Canvas

Agile Approaches


Agile is derived using Lean thinking that applies “Lean” concepts in theinformation technology environment. The key focus of the Lean approach is to: * Eliminate waste from processes * Minimize Business non-value added activities * Maximize added value from the consumer’s perspectiveAgile ApproachesAgile approach is the proven project management methodology that encouragesthe following key concepts: * Frequent inspection and adaptation * A leadership philosophy that encourages team work, self-organization, and accountability * A set of engineering best practices that allow for rapid delivery of high-quality projects * A business approach that aligns development with customer needs and company goals

Agile vs Waterfall – Scope, Time and Cost Triangle


The Waterfall Method’s greatest strengths are its fixed costs andpredictability. You know the price, and when it is going to be delivered. Itsmost significant weakness is its inflexibility. The Agile Method is extremelyflexible and could evolve into a significantly different product than wasoriginally envisioned.Agile vs WaterfallTraditional waterfall approach is built upon the basis of the tripleconstraints of time, cost and scope. Adjusting any of those variables forces achange in at least one of the others. Delivering a successful project isdependent on balancing these three competing variables. But as we know simplyadding resources to a project doesn’t always bring about the desired goals. Asa matter of fact, if resources are added late on a software project, itactually has an adverse effect.Agile Approach takes a different approach by turning the triple constraintsupside down. Rather than viewing scope as fixed at the start, agile approachsets time (iterations) and cost (team members) as fixed; scope is thenadjusted to focus on the highest priorities. Agile is built with theexpectation that scope will evolve over time. The goal is to deliver theclient’s most important requirements within the budgeted cost and time. Agileallows for new requirements or re-prioritization as the project moves forward.Agile vs Waterfall quality

The Agile Approach Umbrella


Since the birth of the Agile Manifesto in 2001, there has much buzz aroundbeing agile. In fact, Agile approach is just a way of thinking that enablesteams and organizations to innovate, quickly respond to changing demand, whilemitigating risk. Organizations can be agile using many of the availableframeworks available such as Scrum, Kanban, Lean, XP and etc….Scrum agile umbrella

Lean Approach


A lean organization understands customer value and focuses its key processesto continuously increase it. The ultimate goal is to provide perfect value tothe customer through a perfect value creation process that has zero waste.5 Step Lean ApproachThe five-step thought process for guiding the implementation of lean approachis easy to remember, but not always easy to achieve: 1. Specify value from the standpoint of the end customer by product family. 2. Identify all the steps in the value stream for each product family, eliminating whenever possible those steps that do not create value. 3. Make the value-creating steps occur in tight sequence so the product will flow smoothly toward the customer. 4. As flow is introduced, let customers pull value from the next upstream activity. 5. As value is specified, value streams are identified, wasted steps are removed, and flow and pull are introduced, begin the process again and continue it until a state of perfection is reached in which perfect value is created with no waste.5 steps Lean Approach

Scrum Approach


Scrum is an agile way to manage a project, usually software development. Agilesoftware development with Scrum is often perceived as a methodology; butrather than viewing Scrum as methodology, think of it as a framework formanaging a process.Scrum Process Canvas

Leave a Reply

Your email address will not be published. Required fields are marked *