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Requirements Analysis

Requirements Analysis

Table of Contents

What is Requirement Analysis and Negotiation?

Requirement analysis is typically a procedure of analyzing, validating, and aligning the requirements documented during the phase of Requirement Elicitation. In other words, requirement analysis is a process of studying and understanding the requirements stated by the stakeholders. Requirement analysis requires frequent communication with the stakeholders and end-users in order to define the expectations, solve the conflicts, and finally, document the key requirements. The solutions may involve issues like:

  • Different kinds of set-ups for the workflow in the company
  • Setting up a new system that is to be used from now onwards, etc. 

One thing to be kept in mind is that Requirement Elicitation and Requirement Analysis work together. They two feed each other. When we start gathering the requirements, we elicitate them and analyze them at the same time as well.

Objectives of Requirement Analysis

  1. The first and foremost objective of requirement analysis is to understand the requirements and needs of the users 
  2. When we use different sources to gather the requirements, there may be some conflicts between them. Requirement Analysis is about finding those conflicts among the requirements stated by the users and resolving them. 
  3. Negotiate the requirements with the users and stakeholders. There is no way our system can meet all the requirements in the exact way they are explained by the stakeholders and users. 
  4. We will have to negotiate and prioritize the requirements. Some requirements may not be big for us but they can be pretty important for the end-users. To understand them, we have to analyze and prioritize the requirements of the stakeholders. 
  5. We must elaborate on the requirements stated by the users and system. This helps while documenting the requirements in the requirement specifications. Also, this helps the developers develop, design, and test better as they understand the requirements in an elaborated and better way. 
  6. We must classify the requirements into various different categories and sub-categories and further allocate those requirements to different sub-systems. 
  7. We must also evaluate the requirements for the quality that is desired by the organization. 

Lastly, we must ensure not to miss anything important.

Requirement Analysis

Requirements Analysis focuses on all the tasks that are used to determine the requirements or conditions to meet the new project in accordance with the requirements stated by various stakeholders. During this activity, we analyze, refine, and scrutinize all the requirements gathered during requirements elicitation in order to establish proper consistency.

Usually, the requirement analysis activities are combined with the requirement elicitation activities of the waterfall process. Sometimes it is also mixed with the requirement specification as well. During elicitation, we gather and capture the requirements. During analysis, we analyze the needs and feasibility of the gathered requirements. We further negotiate the requirements with the stakeholders and end-users to be able to create a particular outcome at the end.

Challenges faced during Requirement Analysis

There are certain challenges that an organization faces when analyzing the requirements gathered from various sources. 

  1. Sometimes it is hard to understand what exactly the stakeholders expect as they themselves are not clear on that part. They usually have some vague idea of what they want and that might arise confusion. 
  2. Requirements are usually dynamic in nature as they keep changing and evolving according to the changing needs. Sometimes the requirements that are stated at the beginning of the project may change when the project progresses. You must always have backup plans for that. 
  3. Poor communication among the team members is another challenge that is faced during requirement analysis. Hence, it is important for project managers to ensure that communication is fluent inside the organization and teams. It would be helpful if project managers use a codified language such as UML as a means to standardize communication and avoid any misunderstandings as well.

Requirements Analysis Process

Generally, there are seven steps in the requirements analysis process.

  1. Identify Stakeholders: To begin, it is essential to determine who the key stakeholders are for this project. These individuals and groups involve internal customers, external users, regulatory agencies as well as any other stakeholders that have a role in building the product. Without them these needs and requirements couldn’t be met- they are the catalyst for progress!
  2. Elicit Stakeholders’ Needs and Requirements: In this section of the requirements analysis process, known as needs and requirements gathering, teams collaborate with stakeholders to recognize their necessities and expectations.
  3. Model Needs and Requirements: After gathering stakeholders’ original needs and expectations, teams can employ visual representations or diagrams to illustrate these requirements as part of their assessment. This allows the team to ensure that feedback is received from all involved parties while any potential issues, discrepancies, or inconsistencies are resolved before establishing a high-quality product outline including use cases and user stories.
  4. Retrospective: After collecting detailed data and information during elicitation, diagraming, and modeling processes, the project team analyzes it. They are particularly interested in comprehending any constraints or drivers that may influence the feasibility of creating the product. This helps them to identify potential risks while also establishing a budget and timeline for completion.
  5. Define an Integrated Set of Needs: The project team develops a comprehensive collection of stakeholder needs and requirements that embody the stakeholders’ expectations, goals, objectives, motivations, and boundaries for the product.
  6. Define Product Requirements: After reviewing the unified set of needs and stakeholder requirements, teams can then develop a definitive set of product feature expectations. This is an essential step, so it’s critical that each requirement meets high-quality criteria in order to create well-formed outcomes. It would be wise for all stakeholders to equip themselves with the knowledge needed to craft excellent requirements.
  7. Sign-off and Baseline: At the conclusion of the requirements analysis phase, all significant stakeholders (or their representatives) who were identified in step one must formally ratify the comprehensive set of needs and associated product specifications. This contract will provide everyone with clarity on how to verify and validate against what was outlined for the product, cost constraints, and timeline expectations; thus guarding against any surprises or scope changes later during development.

This process should be used as a basis for any requirements analysis project as it helps to ensure that stakeholder expectations are met and all necessary features of the product are included. A well-executed requirements analysis process is essential for the successful development of a high-quality software product. The resulting insight into stakeholders’ needs will help the team build an effective solution to satisfy their goals while also staying within budget and on time.

Requirements Modeling

The most common technique during requirement analysis is modeling. The main purpose of modeling is to understand the gathered requirements. A model is typically a copy of something that is usually a smaller version of the real thing that is used for informational purposes. In other words, it is an abstraction of some aspects of the existing or intended system. A model is designed to present information that can be mechanically analyzed. Models are the best way for analyzing an entity by reducing its complexity. 

Since modeling is an essential part of the analyzing process, it must be done properly and carefully. We use modeling to map out the elements that are obtained during elicitation and present them in a more precise and formal form. This helps by making things easier to understand the requirements and issues. Also, when you get such a precise look at something, it becomes easier to find out what is missing or what needs further discussion or alteration. 

There are various languages that are used for creating requirement models. First and foremost is the natural language in which the user describes their needs and requirements. Also, some functional languages like UML, SysML, logic and temporal logic, Use Case Maps, or activity or domain diagrams.

Some Common Requirements Modeling Languages

  • UML: UML stands for Unified Modeling Language, and it is the standard modeling language used by software developers. It allows teams to construct visual diagrams that illustrate how each component of a system interacts with one another.
  • SysML: SysML stands for Systems Modeling Language and is based on UML but it applies more broadly to systems engineering, allowing users to model complex structures such as networks or mechanical systems.
  • BPEL: BPEL stands for Business Process Execution Language and focuses specifically on business processes-that is, the sequencing of tasks that need to be completed in order for an entire business process has been accomplished. This is particularly helpful when stakeholders are looking for a particular outcome from their product.
  • Flowcharts: Flowcharts are a straightforward way of visually mapping out the steps that need to be taken in order for an outcome to be achieved. This can range from small tasks such as developing a user login system to larger and more complex processes like designing an entire application’s workflow.
  • Data Flow Diagrams: Data Flow Diagrams illustrate the flow of information through a system and are used to identify potential data sources, sinks, and processes. This helps teams understand how the product will gather data, feed it into an algorithm or process, and then output the desired result.
  • State Transition Diagrams: State Transition Diagrams map out all possible states that a system can reach as well as any transitions between them. This is typically used for designing user interfaces such as web pages or mobile apps. It allows developers to anticipate every single transition within the user’s journey with the product in order to ensure optimal usability.
  • Gap Analysis: Gap Analysis is the process of comparing two sets of requirements and identifying any discrepancies or gaps between them. This can be used to compare stakeholder expectations with what the team has developed so far, in order to make sure that all necessary features are included within the product before launch.

By using these various modeling languages and analysis methods, teams can gain insight into their stakeholders’ needs and ensure that a quality product is delivered on time and within budget. It is essential for developers to have a thorough understanding of the requirements analysis process in order to create effective software solutions that satisfy customer demands.

These modeling languages allow teams to create detailed diagrams, use cases, and flows which serve as a guide during the requirements analysis process. This ensures that all stakeholders involved have a clear understanding of what is expected from the product, allowing them to easily measure progress against their expectations.

The successful implementation of this process will not only help ensure a high-quality end product but also save time, money, and effort throughout its entire development life cycle, allowing teams to respond quickly and efficiently to any scope or cope changes later during development.

Best Practices for Requirements Analysis

Stakeholders can express their expectations in various ways, such as through needs and requirements. Needs are what the stakeholders require of the product to solve an issue or capitalize on a chance; while Requirements are high-level instructions provided by stakeholders that detail how they anticipate the product should perform to meet those needs. While stakeholder demands are conveyed without the use of mandatory terms like “shall,” their needs must be met with rigor. To ensure that they are binding specifications, which will later be validated to meet the product’s standards, these inquiries should always employ “shall.”

Prior to designing and developing a product, it is critical for the project team to gain insight into various stakeholder needs and requirements. With multiple stakeholders come disparate expectations, so capturing those demands accurately is vital in order to prevent conflicts or any issues from arising. The project squad must elicit these wants and necessities with due diligence while also resolving inconsistencies and conflicting requirements. By synthesizing the needs from this data, we can transform those individual requirements into a comprehensive set of product demands. This will ensure that the developed product meets all stated expectations and adequately satisfies customers’ wants and needs.

Requirements traceability is a critical element of the requirements analysis process, as it allows us to guarantee that each requirement clearly reflects its originator’s intent. Without proper traceability, we cannot be certain if our software product satisfies all stakeholders’ needs, objectives and limitations. Even with perfect execution of requirements analysis, there would be no way to prove that you have the appropriate set of requirements without having tracked those back to their source!

As such, a key approach to requirements analysis is making sure that each requirement can be traced back to all related artifacts. These items must not only include their source but also downstream materials like design, product verification planning, and product validation plans. Additionally, an integral best practice of requirements analysis involves executing a pre-established process accurately — this step could make or break the success of fulfilling stakeholder expectations for the product.

Visure Requirements ALM Platform for Requirements Analysis

Visure’s intuitive interface makes it easy to quickly and efficiently analyze vast amounts of data without having to spend too much time on the task. Additionally, Visure provides a range of powerful tools that allow users to accurately trace back requirements and trace forwards from them through impact analysis, prioritize changes according to cost or risk, and even keep track of change requests. Moreover, Visure’s robust ability to import and export to and from modeling tools such as Sparx Systems Enterprise Architect is something quite useful for safety-critical industries.

With the Visure Quality Analyzer, you can quickly and conveniently access AI technology to assess and identify unclear requirements. This will streamline traceability, enhance requirement quality, promote team cohesion and help guarantee project success. Furthermore, with ITEM Template Guidelines your company can easily create a robust process template that everyone agrees on.

Utilizing Visure, you can construct data models and associate requirements to certain items for an efficient analysis of needs at any level. This means that teams no longer lose time discussing and analyzing requirements, but instead concentrate on quickening the development process. By implementing this system with Visure, your team will be able to efficiently monitor progress without sacrificing valuable time or resources.


Requirements Analysis is key to the success of any software development project. Without a well-defined set of requirements, it is nearly impossible to create accurate plans, achievable goals, and realistic schedules. Of course, Requirements Analysis comes with its own challenges; risks must be identified early and stakeholders must be kept engaged throughout the process. However, by following a careful and systematic process, these challenges can be overcome. The Visure Requirements ALM platform is an excellent tool for managing requirements from beginning to end; try out the free 30-day trial today!

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Implementing AI Best Practices To Optimize Avionics Requirements

September 12th, 2024

11 am EST | 5 pm CEST | 8 am PST

Fernando Valera

Fernando Valera

CTO, Visure Solutions

Reza Madjidi

Reza Madjidi

CEO, ConsuNova Inc.

An Integrated Approach with Visure Solutions and ConsuNova Inc.

Learn how does AI help in Optimizing Avionics Requirements for Safe Takeoff & Landing