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Requirements

Looking for help to get started with IBM DOORS NG?

Looking for help to get started with IBM DOORS NG?

IBM Rational DOORS Next Generation is a web-based requirements management solution for complex software and systems engineering environments. This playlist is for anyone who wants to learn about IBM Rational DOORS Next Generation. The topics are at a high level, providing an overview of key use cases and product features.

More information: http://goo.gl/eZ0cI Using DOORS NG with OSLC: https://jazz.net/library/article/1197 Latest DOORS NG information: https://jazz.net/products/rational-do… Intermediate list of RDNG videos: https://www.youtube.com/playlist?list… Advanced/Administration list of videos: https://www.youtube.com/playlist?list… Configuration management videos: https://www.youtube.com/playlist?list…

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Design Requirements Testing Workflow

Streamlining medical device design for US FDA Compliance

Three key themes to set up your medical device design engineering for success

IBM Engineering Medical device manufacturers must innovate to succeed. To grow, manufacturers must deliver innovative, safe, and fully compliant medical devices. This means adhering to increasingly rigorous regulatory standards like ISO 13485, IEC 82304-1, ISO 14971, IEC 60812, IEC 62304, ISO 60601, IEC 61508, 21 CFR 820.30, and 21 CFR 11 driven by both EU’s MDR and the US FDA regulations. IBM helps to:

Reduce time to innovation

−Adopt agility at scale that meets the needs of each part of your development team such as SAFe®

−Reduce time to market with strategic reuse by creating and managing product variants across multiple product lines Improve quality−Achieve transparency and traceability for design control as a by-product by creating work products in a controlled environment

−Use AI to validate quality of requirements reduce cost of compliance−Understand status, responsibilities, audit trial and history for design control work products at every stage of the development−Automatically generate high-quality documents from multiple sources to support compliance and audit requirements

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Design Requirements Testing Workflow

Q&A: Automotive Compliance Rational DOORS kit for ISO 26262 and IEC 61508

Question & Answer

Question

What is the IBM Rational DOORS Kit for ISO 26262 and IEC 61508?

Answer

The Rational DOORS Kit for ISO 26262 and IEC 61508 is part of the Rational DOORS 9.4, 9.4.0.1, 9.5, 9.5.1, 9.5.2, 9.6, and 9.6.1 release. Project teams in safety-critical industries, such as the automotive industry, can use the kit to help lower the risks and costs of complying with functional safety standards.

You can download the kit as part of the Rational DOORS product download from IBM Passport Advantage. In addition, you can find information about the IBM Rational Rhapsody Kit for ISO 26262 and IEC 61508 in the Rational Rhapsody online product documentation in IBM Knowledge Center. The Rational Rhapsody and the Rational DOORS kits help to quickly and safely deploy the IBM Rational Solution for Automotive.

Kit contents

TitleDescription
TÜV SÜD “Fit for Purpose” certificate for IBM Rational DOORS for ISO 26262 and IEC 61508This PDF document indicates that the TÜV SÜD has certified that Rational DOORS is fit for purpose for developing safety-related software according to IEC 61508 and/or ISO 26262, up to SIL 3 or ASIL D. The certificate covers Rational DOORS 9.4, 9.4.0.1, 9.5, 9.5.1, 9.5.2, 9.6, and 9.6.1.
TÜV SÜD Report to the Certificate for ISO 26262 and IEC 61508This document is the report for the TÜV SÜD Certificate for Rational DOORS for ISO 26262 and IEC 61508.
IBM Rational DOORS Safety ManualThis PDF document describes the features of Rational DOORS, as considered by the TÜV SÜD certificate. The document also describes the workflow and checks that project teams can use for safety-critical development.
IBM Rational DOORS ISO 26262 templateThis template of a Rational DOORS project can be used as a starting point or example of how to configure Rational DOORS for use on safety-critical projects. The template is in DOORS project archive (.dpa) format.
ISO 26262 DOORS template read meThis PDF document describes the contents of the template and explains how to use and deploy it.
IBM Rational DOORS Intended Use Validation Test SuiteThis test suite can be used to help qualify Rational DOORS in safety-critical projects. The test suite is provided as a DOORS project archive file (.dpa).
Intended Use Validation Test Suite OverviewThis PDF document describes the Intended Use Validation Test Suite. The document also explains how to use or augment the test suite to qualify the use of Rational DOORS in a specific environment.

Benefits of using the kit

TÜV SÜD certificates to support tool qualification

The TÜV SÜD Certificate and Report to the Certificate provide an independent third-party review of the Rational DOORS development processes, customer support and defect processes, internal validation test suites, and the Rational DOORS Safety Manual. An organization can use the certificate and report to provide justification and evidence to qualify to use specific tools. The next table contains information about how the certificate and report can support tool qualification.

ISO tool qualification methodApplicability of the TÜV SÜD certificate and related assets
1a: Increased confidence from use in accordance with 11.4.7The TÜV SÜD evaluated the customer information and bug tracking of IBM Rational software, which contributes to an increased confidence because it helps with systematically collecting data and acquiring errors over a large number of customers and projects. This is only one part of the argument and needs to be extended by you based on your usage of Rational DOORS.
1b: Evaluation of the tool development process in accordance with 11.4.8The TÜV SÜD evaluated the Rational DOORS development process according to an appropriate standard based on the relevant portions of the ISO 26262:2011 standard. In addition, IBM holds an ISO 9001 certificate for the Rational DOORS development process. Therefore, the TÜV SÜD certificate and the ISO 9001 certification can be used as justification for this tool qualification method.
1c: Validation of the software tool in accordance with 11.4.9The TÜV SÜD analyzed the validation suite that IBM uses for Rational DOORS relative to the usage of features that are described in the Rational DOORS Safety Manual. Each organization must ensure that the described conditions of use and the used features match the descriptions in the safety manual. Any features that are not described in the safety manual are not covered by the certificate and need extra measures, such as manual validation.

In addition, IBM provides a Rational DOORS Intended Use Validation Test Suite for customers who want to use Rational DOORS differently than is described in the safety manual to validate that the features work as intended in their environment. This test suite is not covered by the certificate, but the test suite can be used to help enforce the argument for 1c.
1d: Development in accordance with a safety standardThis argument is not applicable because Rational DOORS was not developed as a safety item in accordance with a safety standard. The methods that the ISO 26262 requires, such as MC/DC coverage and semiformal verification, are not completely applied.

Validation test suite to run validation tests in specific environments

The Rational DOORS Intended Use Validation Test Suite is a customizable Rational DOORS project that contains a set of requirements that trace to features, test cases, and tests. You can run the tests in your environment to document and verify your usage of Rational DOORS.

Rational DOORS ISO 26262 template

The ISO 26262 template includes the basic modules and attributes that you can use to capture requirements and safety information throughout the safety lifecycle. The template also includes DXL scripts that determine the Automotive Safety Integrity Level (ASIL) of a safety goal based on severity, exposure, controllability, and the propagation of the ASIL down the requirements hierarchy from the safety goals.

Additional resources

For more information about using Rational DOORS for projects that must comply with ISO 26262, see the white paper ISO 26262 compliant usages of IBM Rational DOORS in safety critical E/E-projects within the automotive domain (ftp://public.dhe.ibm.com/common/ssi/ecm/en/ral14048usen/RAL14048USEN.PDF).

For specific guidance about requirements and safety management, along with tool mentors that can help with ISO 26262 compliance, use the practice content and workflow template for IBM Rational Method Composer and IBM Rational Team Concert™. If you have a Rational Method Composer license, you can download the additional practice content at http://ibm.com/support/docview.wss?uid=swg24030663.

Disclaimer
The artifacts described here, including the practice mappings to standards, such as DO-178B and ISO-26262, can be used to help Licensee meet compliance obligations, which may be based on laws, regulations, standards or additional practices. Any directions, suggested usage, or guidance provided by the practice mapping does not constitute legal, accounting, or other professional advice, and Licensee is cautioned to obtain its own legal or other expert counsel. Licensee is solely responsible for ensuring that Licensee and Licensee’s activities, applications and systems comply with all applicable laws, regulations, standards and practices. Use of this practice mapping does not guarantee compliance with any law, regulation, standard or additional practice.

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Design Requirements Testing Workflow

MBSE Introduction

This short video gives a brief overview of the capabilities and benefits of Model Based Systems Engineering with IBM Engineering Lifecycle Management

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Design Requirements Testing Workflow

Getting requirements right: avoiding the top 10 traps

Don’t get caught

A trap is a position or situation from which it is difficult or impossible to escape. Getting caught in product or software development requirement traps can be problematic. The traps of bad requirements definition and management result in cost overruns, missed deadlines, poorly designed products, and a failure to deliver what the customer needs.

Imran Hashmi Canadian Hub for Requirements Management

Unfortunately, requirement traps are common. The State of the IT Union Survey explored the development management practices that teams applied to either stay out of trouble or address problems after they are discovered. The online survey of respondents reveals how often product development teams anticipate that they’ll fall into traps. They pad budgets and schedules. They change initial estimates to match actual results. And they request additional resources. Figure 1 reveals the lengths teams and team leaders will go to deal with these traps.

Imran Hashmi Canadian Hub for Requirements Management

Poor requirements management results in inconsistent project outcomes.

Products today depend on software to deliver their value. A brake sensor on a car, a home appliance, a medical device—all contain software that plays an increasingly important role. The products are becoming smarter, and they involve more people and teams outside the typical value chain. Smarter management of the requirements process— the foundation of effective product and software delivery— is increasingly important for delivering these products.

This article presents 10 common mistakes that project teams make in defining and managing requirements. More importantly, it discusses how to avoid these traps so you can get your requirements right and develop the right product on time and within budget.

Trap 1: scope creep

Scope creep usually involves features being added to previously approved product designs without corresponding increases in resources, schedule, or budget. The potential causes vary, but creep tends to occur when project requirements are not defined and managed properly.

Creep can also occur when development teams create solutions before determining what the business needs. The business requirements of a project are typically seen by development teams as being too high level and vague and not applicable to them. They want to focus on detailed product requirements. However, business requirements are real requirements and they need to be sufficiently detailed to avoid scope creep. By meeting the product requirements and not the business ones, teams fail to develop solutions that provide value and may overcompensate by adding features.

Avoid the trap

  • Map detailed, real business requirements to product features that satisfy those requirements and provide value.
  • Manage change, be vigilant about focusing on business requirements prioritization.
  • Identify and work with stakeholders early and often to understand the business requirements, stakeholder priorities, and the effect on stakeholders when changes occur.

The payoff: Avoiding scope creep makes planning easier, helps keep budgets intact, and helps keep projects on schedule. Most important of all, it helps generate the desired return on investment.

Trap 2: asking customers what they want

This seems counter-intuitive. Teams are supposed to talk to customers and give them what they want in a product. But customers tend to talk about features, not what they truly need. The truth is that people often don’t know what they want. And when customers don’t know what they want and developers don’t understand the problem, poorly conceived solutions— and products— can result.

Avoid the trap

  • Ask customers why they need a particular capability. It may lead to a better understanding of their expectations and better discussions about specific requirements.
  • Guide the discussion away from focusing on features— ask customers what they want the product/software to do. Create a separate discussion for how the resulting products will be used.
  • Identify the right stakeholders. The target audience or end-user may not be the person who is responsible for the project or invested in its success. Find— and listen to— the right mix of users, customers, executives who fund the project, government representatives who impose regulations, project teams, support teams, and others.

The payoff: Asking customers what outcome they are seeking helps you determine the true and realistic product requirements that will deliver value to them.

Trap 3: inability to adapt to change

Setting requirements in stone early in development can be a recipe for disaster that results in an enormous waste in resources and an inability to stay on schedule. As recent changes in the global economy illustrate, outside influences can quickly change project requirements. Organizations have quickly changed their focus to doing more with less. Speculative or experimental pet projects are off the table, replaced by those with strong potential ROI. Yet in any economy, there are always new requirements to contend with as business priorities change, new government regulations are enacted, and new stakeholders are identified. Project teams need to accommodate those changes.

Avoid the trap

  • Expect and plan for requirements that change throughout your development process.
  • Re-prioritize requirements based on shifting circumstances such as business needs, customer importance, estimated effort, and cost.
  • Have a fine-grain plan that you adjust at regular intervals.
  • Keep your stakeholders informed as changes occur— get their input for prioritization and the rationale behind it.

The payoff: Accommodating and planning for change in project requirements helps mitigate risk and decreases costly rework.

Trap 4: failure to communicate effectively

Ineffective communication is often a root cause of project failure. The perspective of development teams, customers, end-users, and executives are different for each group, as are their needs for communication. If you don’t express requirements using methods your stakeholders can easily understand, you can’t possibly gain consensus on requirements.

Avoid the trap

  • Know your audience and communicate in ways that help them understand the information. Make use of diagrams, user stories, sketching, and storyboards.
  • Create glossaries, document templates, and feedback forms that are clear, concise, and easy to use.
  • Use prototyping to help stakeholders visualize the solution. This can either augment text or completely replace it depending on the level of detail required.
  • Elicit feedback from all of your stakeholder representatives. Remember that one or two people tend to be the most vocal. Don’t make the mistake of overlooking others’ feedback.
  • Always respond to feedback, preferably with some clear statement of status such as, “will incorporate,” “placed on a wish list” or “unable to accommodate” If you ask for input, acknowledge it.

The payoff: Effective communication makes the most efficient use of everyone’s valuable time and helps avoid misunderstandings that derail projects.

Trap 5: failure to communicate frequently

Failure to communicate with stakeholders early and often leads to one primary problem: rework. Developing a product for customers without consulting them while that product is being developed is just asking for trouble. The biggest reason it happens is that we often think we know what our customers want well enough that we don’t need to consult them. And stakeholders usually have different priorities.

Sometimes teams don’t communicate with stakeholders because they prefer to avoid confrontations. But if you want a positive result and minimum risk and rework, it is important to collaborate with stakeholders not just at the beginning of a project but throughout the entire process, from start to finish.

Avoid the trap

  • Identify key stakeholders, including customers. Choose a representative from each group to communicate with regularly.
  • For large, in-person stakeholder workshops, consider using skilled facilitators. Good facilitators are worth their weight in gold in keeping everyone on track for attaining the meeting objectives.
  • Establish regular checkpoints with your stakeholders. Determine at the beginning of the project how often you need to check-in.  Schedule time for keeping stakeholders up to date as unexpected changes occur.
  • Make it easy for your stakeholders to provide feedback. When they do, let others see their feedback to generate better discussions.

The payoff: Regular communication reduces risks, increases team productivity, and avoids rework. Ultimately it helps deliver the product the customer wants.

Trap 6: unwieldy documents and too much information

Do you have time to review and give feedback on a 200-page document? Probably not— and most likely, neither do your stakeholders. Doing more work than necessary and adding unnecessary detail to documentation costs both time and money. It is unproductive for the person creating it and a hindrance to the people looking for information they need to get their work done. Two common missteps include adding too much detail to requirements too early in the process and requiring more traceability than is necessary to facilitate effective lifecycle management.

Think quality, not quantity. Better to add just enough detail to your requirements and identify just enough traceability to get the job done— not the entire job, but the next piece or iteration that needs to be completed.

Avoid the trap

  • Large, dense documents are not very consumable by stakeholders. Invest in communication tools that efficiently gather and disseminate requirements information.
  • Use visual techniques to model business and product requirements. Business process diagrams and use case diagrams, storyboards, and sketches can help cut through text-heavy clutter.
  • Provide a glossary of industry terms, acronyms, and domain-specific terms to facilitate communication.
  • Create transparency of feedback. When your stakeholders can review each other’s feedback, the discussion is richer, problems come to light, missing requirements are identified and necessary details get filled in.
  • Add just enough information to your documents so the rest of your team members can complete their work.
  • Remember that requirements management is an ongoing process. There will be other opportunities to add more detail to requirements and to capture more traceability later when it may be more appropriate.

The payoff: Focused documentation and feedback loops increase the efficiency of all stakeholders. Reduction of extraneous details in both requirements and traceability increases quality by focusing on the most important information— while postponing further detail until it’s needed.

Trap 7: hidden project artifacts

Engineers, developers, and testers often aren’t aware of the project vision or can’t locate the documentation for the architecture or the business requirements— that is, if they’re created at all. Without easy access to these foundational documents, how can we possibly expect them to deliver models, code, and tests that solve the right customer problems? We can’t. Transparency to all project artifacts is critical to the success of any software project.

Avoid the trap

  • Keep all project artifacts in a central repository that is accessible by project team members. Having to search multiple sources for relevant documents is frustrating and time-consuming.
  • Make sure documents are categorized and managed in such a way that they are easy to find.
  • Ensure that when changes occur, the team is informed. Automatic notifications can help deliver this information.

The payoff: Accessibility and management of information and transparency of project artifacts reduces rework, diminishes waste, and promote reuse because it makes collaboration and communication easier.

Trap 8: Ambiguous requirements

Ambiguous requirements are the result of unclear or missing information. This leads to confusion and rework. Project teams spend too much time trying to get clarification so they can design, code, and test. It’s very difficult for engineers or architects to develop relevant models, developers to write defect-free code and testers to develop the right test cases without clear requirements. Unfortunately, reworking requirements are so common that it can become an accepted practice— rework is just built into the schedule and budget.

Ambiguity also tends to push risks into the next phase of the project. Requirements then have to be reworked, and that poses problems to project schedule and cost. This trap is especially damaging to fixed-cost projects.

What causes ambiguity? Poor writing, inaccurate information, and the assumption that the audience understands just as much as you do.

Avoid the trap

  • Use a writing reference, such as Elements of Style by William Strunk and E.B. White— which has long been considered the authoritative reference on writing crisp, clear text— before and during requirements creation.
  • Create a glossary, and make sure every acronym and technical term is included.
  • Pretend you are writing for a student just out of college or someone who recently joined the organization. Don’t assume the audience will know every term and understand every concept.
  • Augment text with visuals. It’s a great way to express both simple and complex concepts.
  • Step back. After writing any draft document, put it down for a while and read it later. A fresh perspective can reveal ambiguities.

The payoff: Clear, understandable requirements are the foundation of your software project.

Trap 9: failure to measure and assess requirements processes

Defining and managing requirements can be a complex task. Missing and ambiguous requirements can easily result in missed schedules, cost overruns, and decreased productivity and quality as downstream project deliverables fail to provide value to stakeholders. Don’t wait for disaster to strike— assess your project status regularly.

Organizations must have the ability to review, assess, and improve their requirements process. Having accurate insight into data, processes, and practices is a key component of success. Measuring project and process outcomes allow for continual process improvements across the software delivery lifecycle, which reduces project failures and lowers business costs.

Avoid the trap

  • As part of your process, conduct a “lessons learned” feedback session at the end of each development iteration or release.
  • Also, do a “lessons remembered” session before starting a new project. To encourage continual improvement, you need to not only capture lessons learned at the end of an iteration or release but also reinforce those lessons as you move forward.
  • Define and collect metrics that ensure your success. For example, measure the impact of changes to your requirements, test case coverage, priority, cost and effort of business, and product requirements. As you become more experienced with measurement, you’ll find just the right combination of metrics that allows you to continually improve your requirements process.

The payoff: Ongoing measurement of project performance reveals small problems before they become big issues.

Trap 10: Isolating your requirements

Viewing requirements as isolated entities, failing to capture relationships between requirements and other artifacts, and failing to recognize dependencies between requirements leads to increased project risk and rework. Re-prioritizing one requirement without considering its effect on other requirements results in increased project risk and costs.

For example, a risky trap that organizations often succumb to is not capturing the relationship between project requirements, business requirements, and other downstream deliverables such as models, test cases, and defects. When you fall into this trap, you deliver a product that doesn’t satisfy stakeholder needs.

Avoid the trap

  • Identify relationships between requirements and then manage them together.
  • Create the right level of traceability between requirements and downstream deliverables that balances the traceability needed for effective lifecycle management with support for productivity.
  • As you make changes to requirements and re-prioritize them, consider the effect of these changes to related requirements and your downstream deliverables.
  • Use tools that allow you to easily visualize the relationships you’ve identified.

The payoff: Identifying and managing relationships between requirements and other artifacts mitigates project risk; helps ensure alignment between your business requirements, product requirements, and downstream deliverables; and results in lower development costs.

IBM requirements solutions can help you avoid common software development traps.

There are many traps in software. Some of the most expensive ones occur in the requirements space because that is where the foundation for your project is laid. Lack of planning, lack of communication, and collaboration with stakeholders, ineffective requirements elicitation, and requirement management techniques all lead to problems. When we don’t measure how we’re doing and continually make improvements, the risk escalates quickly and the project gets out of control— something you may never recover from.

IBM software requirements solutions incorporate many best practices that help you avoid these common traps and enjoy the payoffs.

IBM’s requirements management solution enables you to capture, trace, analyze, and manage changes to requirements in a secure, central, and accessible location. These capabilities strengthen collaboration, increases transparency and traceability, minimizes rework, and expands usability. IBM solutions make it easier to adhere to standards and maintain regulatory compliance.

Key capabilities include:

  • Requirements traceability – Link individual artifacts to test cases for full visibility of changes in requirements as they happen. Capture all annotations, maintain them, and make them easily accessible.
  • Variant management – Manage the entire version and variant process while monitoring the progression of the system through a shared dashboard. Store data in a central location and present it in document format.
  • Compliance – Incorporate industry standards and regulations into your requirements to achieve compliance early on. Building compliance into the end-to-end engineering lifecycle makes achieving compliance less complex.
  • Quality – Using Watson Natural Language Service IBM provides the capability to evaluate requirement quality using guidelines from INCOSE for writing complete, clear, and testable requirements – to accelerate your review process and increase requirement quality.

For more information

To learn more about IBM requirement solutions for software or product development, contact your IBM representative or IBM Business Partner, or visit IBM Requirements Solutions.

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1, 2 Scott W. Ambler, “State of the IT Union Survey,” Ambysoft, July 2009, http://www.ambysoft.com/surveys/stateOfITUnion200907.html