Discussion Questions

There is no universally best SDLC model. The choice depends on factors such as project size, complexity, budget, timeline, risk, team experience, and customer involvement. For example, Agile is suitable for changing requirements, while Waterfall works well for projects with stable and well-defined requirements.

Yes. Agile can fail if there is poor stakeholder involvement, unclear requirements, lack of experienced team members, poor communication, resistance to change, or when the organization does not truly follow Agile principles. Without continuous collaboration and feedback, Agile loses its effectiveness.

Yes. Waterfall is still widely used in industries such as healthcare, banking, aerospace, government, and defense where requirements are stable, documentation is mandatory, and regulatory compliance is important.

Yes. Many organizations use hybrid approaches. For example, requirements and planning may follow Waterfall while development uses Agile. The choice depends on project needs and organizational practices.

Yes, but it increases the risk of misunderstandings, scope creep, incorrect implementation, and rework. Even Agile projects maintain some form of documented requirements, such as user stories or product backlogs.

Certain testing activities can begin early. Test planning, test case preparation, reviews, and static testing can start before development finishes. Continuous testing is common in Agile and DevOps, but complete functional testing requires working software.

In theory, certain types of code coverage can reach 100%, but achieving complete testing of every possible scenario is practically impossible due to time, cost, and the enormous number of possible inputs and execution paths.

Not necessarily. Finding many bugs may indicate thorough testing, but it can also suggest poor software quality. Effective testing focuses on identifying critical defects early while helping improve overall software quality.

The terms are often used interchangeably, but a defect usually refers to a flaw introduced during development, while a bug is the observable incorrect behavior caused by that defect. In practice, both terms commonly describe software errors.

Yes. If the project delivers high business value, satisfies customer requirements, maintains quality, and achieves organizational goals, it may still be considered successful despite schedule delays.

Yes, but it is generally risky. Internal systems or emergency fixes may skip UAT under special circumstances, but production software intended for end users should ideally undergo UAT to ensure it meets business requirements.

Discuss the identified issues with the client immediately, explain the potential business impact, document the necessary corrections, obtain formal approval for the revised requirements, and update all related project documentation before development continues.

Yes. Agile values working software over excessive documentation, but essential documentation such as user stories, architecture diagrams, API documentation, acceptance criteria, and technical documentation remains important for communication and maintenance.

No. Every project requires some level of design. Agile projects may use lightweight and evolving designs, while traditional projects often perform detailed upfront design. Skipping design entirely usually leads to technical problems and increased maintenance costs.

No. DevOps is not an SDLC model. It is a culture and set of practices that integrates development and operations to automate software delivery, improve collaboration, and enable continuous integration and continuous deployment.

According to Scrum, each product should have a single Product Owner responsible for prioritizing the backlog. Large organizations may have supporting roles, but one person should remain accountable for product decisions.

No. Agile is a software development philosophy based on the Agile Manifesto, while Scrum is one of the frameworks used to implement Agile principles.

No. Agile is most effective when requirements change frequently and customers are actively involved. Projects with fixed requirements, strict regulatory compliance, or contractual constraints may be better suited to traditional or hybrid approaches.

According to Scrum, sprint durations should not be extended. Unfinished work is typically returned to the product backlog, reprioritized, and considered for a future sprint.

Not always. Critical, security, and high-priority defects should be fixed before release, while minor cosmetic issues may be deferred if they have minimal business impact and the release deadline is important.

No. Every change request should undergo impact analysis to evaluate its effect on cost, schedule, scope, quality, and business value before approval.

No. Many projects begin with incomplete or evolving requirements. Agile projects expect requirements to change throughout development, while traditional models aim to define them as completely as possible before implementation.

Yes. Maintenance is the final phase of the SDLC and includes corrective, adaptive, perfective, and preventive maintenance to keep software reliable and up to date after deployment.

Although some projects may succeed without formal risk management, doing so significantly increases the likelihood of delays, cost overruns, quality issues, and project failure. Effective risk management improves project success.

No SDLC phase should be removed because each serves an essential purpose. Skipping requirements may build the wrong product, skipping design creates poor architecture, skipping testing introduces defects, and skipping maintenance reduces software reliability. Every phase contributes to successful software development.