Requirements Analysis Using Event/Response and Use Cases: Analysis Sequence

Planning

Getting requirements right is a process. Your business stakeholders will rarely (if ever) be able to give you all of their requirements without some method of generating relevant questions to draw the requirements from them. What I am going to present in this and the following posts on this topic is NOT a new way to document your old thinking. It is a new way to think about requirements.

The deliverables created from this approach are:

  • Identification of all processes in scope
  • Documentation of the specific Use Cases for each process
  • Identification of all of the stakeholders that interact with the business processes
  • Creation of a framework with which you can generate and execute your test cases

Many analysts start and end their requirements elicitation with “functional requirements” (e.g. “I need to search by Last Name” or “Requests for time off need to be approved by the manager”). In the Event/Response/Use Case approach, functional requirements are derived from the Use Cases at the end of the analysis process.

The analysis sequence is as follows:

  • Business Objectives
  • Project Objectives (1st cut)
  • Event Model
  • Project Objectives (verified)
  • Use Cases
  • Functional Requirements

In the next post, I will discuss how the Business and Project Objectives are defined and used in the Event/Response methodology.

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Requirements Analysis Using Event Response and Use Cases: Overview

Initiation

This is the start of a multi-part series on my favorite requirements elicitation technique: the Business Event/Response Analysis. Early versions of this methodology were developed in the late 1980’s by some of the great system development minds of that era. Since then it has evolved and I have adapted it to meet the needs of whatever organization for which I am working.

There are some that think you can gather requirements by just asking the sponsors and users “what do you want?”. Needless to say, this method will generate incomplete requirements and tends to start and end with functional requirements. In the latter half of the project when large requirements gaps are discovered, the sponsors/users blame the analyst and vice versa.

When I teach on this topic, I tell the analysts it is their responsibility to gather complete requirements. Given this, we need a method that will (1) generate the appropriate questions to ask, (2) ensure that we have the complete set of requirements, and (3) allow us to derive the functional requirements from the model.

The Business Event/Response method meets these desired outcomes. The advantages are:

  • It helps the Business Analyst create the questions needed to draw the requirements from the Business Owner, even if the Analyst has no knowledge of the business area.
  • It organizes the requirements in the context of Business Processes and Usage to promote better understanding.
  • The output serves as a starting point for defining the testing scope and scenarios.

In the upcoming posts I will describe this method in detail.

Requirements Elicitation Techniques Part 14 – Summary

Planning

In the prior posts in this series, I introduced the following requirements elicitation techniques:

 

  • Part 1 – Overview
  • Part 2 – Acceptance Criteria
  • Part 3 – Benchmarking
  • Part 4 – Business Rules Analysis
  • Part 5 – Data Modeling
  • Part 6 – Document Analysis
  • Part 7 – Interviews
  • Part 8 – Non-functional Requirements
  • Part 9 – Observation
  • Part 10 – Prototyping
  • Part 11 – Root Cause Analysis
  • Part 12 – Surveys and Questionnaires
  • Part 13 – SWOT Analysis

These are in addition to the Business Event/Response technique which I discussed in detail in a prior post. These techniques can be considered a “toolbox” from which you can select the appropriate tools for the job. You will likely never use all of these in a single project. Based on the type of project you are working on, you will select the techniques that fit the size, background and scope of the project. Every Project Manager should have familiarity with these techniques and be able to apply them. They are core techniques in the Business Analyst’s Body of Knowledge (BABOK).

If you are a Project Manager and don’t currently perform the Business Analyst function, I encourage you to get training in this area. PM’s that can perform this function are immensely valuable to their organizations.

Feel free to leave comments on your own experiences as a Business Analyst. Include what worked well, what didn’t and why.

 

Requirements Elicitation Techniques Part 13 – SWOT Analysis

Planning

The acronym SWOT stands for “Strengths, Weaknesses, Opportunities, Threats”. It can be a useful tool to analyze a business process undergoing change. Honest evaluation from all parties is important here. The group undergoing the evaluation must not feel threatened by the analysis. Note that “Opportunities and Threats” are external factors beyond the scope of control of the assessed group.

As with all endeavors in the field of project management, always make sure you have first defined your objectives and expected outcomes of the analysis. This will ensure that proper use is made of the results.

The SWOT evaluation team should be comprised of a cross-section of middle and upper management of the business process owners, as well as those who actually participate in the execution of the business process. The team should be instructed to first identify the Strengths, Weaknesses, Opportunities and Threats independently to avoid group bias. Then the group is brought together to compare notes and agree on the final list.

You then make a matrix with S and W as the rows and O and T as the columns. The cells are filled in by the evaluation team as follows:

  • SO – How can the groups strengths be leveraged to exploit the potential opportunities?
  • ST – How can the group use its strengths to ward off potential threats?
  • WO – Can the group use an opportunity to eliminate or mitigate a weakness?
  • WT – Can the group restructure itself to avoid a threat?

The answers are analyzed to determine cost of implementing vs. value and from that you can determine which of these the project sponsor wishes to include as part of the business requirements for the project.

 

Requirements Elicitation Techniques Part 12 – Surveys and Questionnaires

Planning

For some projects you may need to gather information from many people in a short time. When you have this condition, surveys and questionnaires can be very efficient.

First lets define the terms. A survey encompasses all aspects of the research process (design, construction, sampling method, data collection and response analysis). A questionnaire is a tool used for a survey and is a set of questions with a choice of answers.

Let’s look at the steps to conducting a requirements gathering survey:

  • Design – You will need the answer to questions such as “What are the objectives?”; “What media will be used?”; “Who will it be sent to?”; “How long will be given to respond?”; “What will you do with non-responders?”; “Who will compile and analyze the data?”
  • Construction – “Who will determine the questions to ask?”; “How many questions will be asked?”; “Will you allow open-ended responses?”; “Who will create and distribute the questionnaire?”. A tool such as Survey Monkey can be useful.
  • Sampling Method – You will need to define the target population. If the entire population is sufficiently small, you can include everyone. If the population is large, you will need to use statistical sampling methods. Consult the statistician on your team or company for advice on the various methods.
  • Data Collection – The method of data collection should have been determined in design. Collect and summarize the data as a prerequisite to response analysis.
  • Response Analysis – This ties in to the objectives you defined in design. The method and people involved were determined in design. The responses are used to guide the direction of the requirements.

Requirements Elicitation Techniques Part 11 – Root Cause Analysis

Planning

The purpose of root-cause analysis is to determine the underlying source of a problem under study. Doing this will help ensure the requirements attack the real problem and not just the symptoms.

A critical element is to challenge the current business thinking and processes.You want to overcome the “we’ve always done it that way” answer to the question “Why do you do this?”. I recently managed a project where it took interviews with dozens of people to finally get the answer to the question of why the pay week started on a Saturday instead of Sunday where the sales week started.

The steps to root cause analysis are:

  • Define the problem under study and understand the impact
  • Analyze the problem to determine the root cause
  • Agree on solutions to prevent the problem from occurring

One technique to analyze the root cause is the “five whys” to explore the nature and true cause of a problem. This means repeatedly asking “why” after a question is answered until you uncover the real root cause. It may be more or fewer than five, but five is a good rule of thumb.

You can create a visual of your “five whys” analysis using a “Cause Map”. A Cause Map is simply a block on the left that identifies the problem, an arrow labeled “why” going left to right to another block that answers the question, then an arrow labeled “why” going left to right to the next answer and so on until the root cause is identified.

Root Cause Analysis is a good addition to your requirements analysis repertoire. If your project is not addressing the true root causes of the problem definition then you are unlikely to achieve the defined business objectives.

Requirements Elicitation Techniques Part 10 – Prototyping

Planning

Prototypes are the shell of an actual production application and are used to provide insight into the look, feel and flow of an application. The main purpose is to gather requirements related to the user interface. A “throw away” prototype seeks to quickly uncover and clarify system interface requirements. It is especially useful in cases where the most efficient workflow can only be discovered with hands-on experience.

Some have made the mistake of thinking prototyping is all you need to do to gather requirements. This will almost always be a costly mistake! Other requirements techniques will need to be used to get a complete set.

When you obtain the user interface requirements using prototyping, the next step is to integrate these requirements with your use cases, scenarios, data model and business rules. Your new discoveries will usually result in changes to previously gathered requirements.

There are two categories of prototypes used to uncover functional scope:

  1. Horizontal Prototype – models a shallow and wide view of the system’s functionality. It typically does not have any business logic running behind the visualization.
  2. Vertical Prototype – models a deep and narrow slice of the system’s functionality. There usually will be some business logic built to uncover complex requirements.

It is a judgment call as to whether or not to use prototyping on a particular project. You must weigh factors such as the importance of the user interface, the clarity of the requirements gathered via other methods, the difficulty in building the prototype, and time constraints.