What is Digital Twin?
This article was written by Bartosz (Bart) Chrabski of SmarterProcess – with some minor contributions from yours truly.
You may remember an old western movie titled The Good, the Bad and the Ugly starring Clint Eastwood. testing can sometimes feel the same way.
In today's dynamic product development arena requirements keep changing and evolving. There is a relationship between three dimensions – namely cost, quality and time.
Ideally, we would have sufficient budget, time, and – product teams would be able to implement a high-quality product. In practice, it's rarely the case that projects have enough budget and time. Often projects run over budget and experience time constraints. As a result, testing efforts are rushed and the quality of the product suffers.
Verification and validation of products – software and hardware – are some of the most critical steps in the development process and typically consume 30% to 35% or more of the total cost and effort in most projects.
Testing is often the least planned part of the development lifecycle. This lack of rigor can lead to the delivery of lower quality products and applications, which have a negative impact on customer satisfaction.
This article outlines some of the most common challenges encountered in testing efforts and presents several recommended practices. These practices will improve the efficiency and accuracy of your testing processes.
Problems resulting from poor testing processes have many different sources, often from poor planning or execution of testing tasks.
Below are some of the causes we have observed in real world projects.
• Lack of an independent test team
Most small project teams do not have an independent test team. The people who act as testers are at the same time developers, engineers, or analysts – often focused on other responsibilities, which may lead to incomplete or ineffective testing. Depending upon your industry, regulations may require a separate dedicated testing team.
• Limited understanding of the testing process
In small projects, often a project manager also acts as a test manager and may lack of appropriate knowledge and skill to plan and execute test activities – and their responsibilities of the two roles may conflict.
• Poor test planning
Planning the testing process is rarely perfect – testing is often only done to the extent that time is available. Sometimes testing is like an exorcism designed to get rid of evil spirits in a project. Often the person responsible for planning the testing may not be familiar with the testing process and may miss important steps.
• Lack of qualified resources
It can be difficult to find staff with the motivation and skills to do the testing. Since locating the appropriate skills can be challenging, positions are often filled with inexperienced testers, which may lead to incomplete or ineffective testing.
• No test data (no data-driven testing)
In our experience clients often underestimate the importance of good test data. Frequently, test data does not cover all possible conditions occurring in the application. In some cases, no test data is delivered at all. The result is that not all scenarios will be tested, which leads to quality issues.
• Lackluster test environment or product configuration
Some practitioners involved in testing underestimate the importance of getting the test environment and its configuration set up correctly. It's standard practice to treat development, test, and production systems differently – mostly because they have differing security, data, and privacy controls. Testing in production can lead to corrupted or invalid production data, leaked protected data, overloaded systems and more.
If there is a separate dedicated test environment it may not match the proposed production environment. The wider the gap between test and production, the greater the probability that the delivered product will have more defects. It is common for test teams to clone the production data and use it for testing purposes. This approach can be time-consuming, error-prone and may not meet the data protection policies.
• Poor release management
Many projects do not have a well-documented release management process for testing purposes. This lack of rigor may lead to inconsistencies. Often, we have seen situations where a patch designed to correct a problem injects new ones, which may lead the system to fail.
• Inadequate defect management
In small organizations defects are sometimes not tracked centrally or are manually tracked using spreadsheets or email. This approach leads to inaccuracies or failures to correct defects. Manual operations are also burdened with a considerable amount of work to maintain the process.
• No central repository of test cases
Many legacy products/systems may have been used for years and often a test case repository is not available or maintained. If they are maintained, they usually contain just the latest requested changes and not the complete functionality of the product/system. New team members will struggle to learn the full functionality and to perform tests without reference to past test cases. This can lead to incomplete and error prone testing.
• Incomplete regression tests
When test case repositories do exist they are often outdated or incomplete. As functionality changes test cases should also be maintained and updated to match those changes. Regression tests that are limited to new capability results in poor test coverage and subsequently leads to new defects being injected to a partially tested product.
• Limited testing automation
Often, repetitive testing is performed manually. Automation can aid in creating the test environment building as well as functional regression testing, load testing, coverage testing and release management.
We suggest you evaluate the automation you have available inhouse and from 3rd parties. Assess the value of using automation versus the cost and effort. Is this a product/system that will be around for a long time and the effort of automation will continue to be used? Or is this a short-term fix with a limited life?
• Lack of training
Members of the project teams may not be familiar with the tools that are available to them or may not be trained on how to use them. Consequently, although the organization has tools they are not used. Lack of tool usage/knowledge can result in the limited ability to effectively track errors, supervise the entire process, or define measures and metrics to manage system development effectively.
• Lack of knowledge of available methodologies
Many project teams lack documented and understood testing methodologies and processes. Lack of following existing methodologies/processes or the absence of a documented approach leads to an inefficient testing process. The adopted methodologies and methods do not always have to be written down in the form of official documents, but they must be understood and applied in practice.
• Measures and metrics
Often, organizations collect data on ongoing projects but sometimes do not analyze the testing processes to seek improvements. For example, if it is uncovered that poorly documented or understood requirements are creating testing errors, the need arises to improve requirements elicitation and documentation process. This postmortem analysis provides an opportunity for iterative improvement of the testing phase.
We recommend testing retrospectives to see what the team has learned and what can be done to improve the overall development process.
The following are the best market practices. These practices are recommendations that are not applicable in every test team and not in every organization. Based on our practical experience we suggest:
Regardless of the type of project, testing should be given special attention. Testing must be well planned, executed in a repeatable documented manner by qualified and trained people. Without this supervision it will be difficult to call tests effective.
IBM Test Management solutions can help you avoid common software development traps.
Lack of planning, lack of metrics, and collaboration with stakeholders, ineffective test management, and lack of test automation, all lead to problems. When we don't measure how we're doing and do not continually make improvements, the risk escalates and the project can get out of control.
IBM software test management solutions incorporate many best practices that help you avoid these common traps and enjoy the benefits. IBM Test Management is a collaborative, web-based, quality management solution that offers comprehensive test planning and test asset management from requirements to defects. It enables teams to seamlessly share information and use automation to speed project schedules and provides metrics for informed release decisions. It is available both on-premise or as a SaaS solution.
Key capabilities include: