Software Development Methodologies

 

Sequential Methodologies

These models require each phase to be completed and signed off before the next one begins. They are best suited for projects with well-defined, stable requirements.

Methodology	Core Concept	Structure & Flow	Key Focus	Best For
Waterfall	Linear and sequential process.	Phases flow steadily downwards (Requirements-Design-Implementation-Testing-Deployment). No going back easily.	Upfront planning, detailed documentation, and fixed scope.	Projects with stable, well-known requirements
V-Model	Extension of Waterfall that emphasizes testing at every stage	Each development phase on the left side (Requirements, Design) corresponds to a specific testing phase on the right side (Acceptance, System, Integration, Unit Testing).	Verification (building the product right) and Validation (building the right product) are tightly linked.	High-quality, Safety-critical systems (medical, aviation, automotive)

Iterative and Incremental Methodologies

These are based on the Agile Manifesto principles, Lean manufacturing, prioritizing flexibility, collaboration, and rapid delivery in small increments.

Methodology	Core Concept	Structure & Flow	Key Focus	Best For
Lean	A philosophy (originating from manufacturing) that focuses on maximizing customer value while minimizing waste.	Focuses on seven principles, including eliminating waste (e.g., unnecessary features, delays), building quality in, and optimizing the whole.	Waste reduction, speed, and efficiency to deliver value faster.	Teams wanting high efficiency and minimal waste
Agile	An iterative and incremental approach focused on delivering value continuously	Delivers working software in short Cycles/iterations with continuous feedback and adaptation.	Customer collaboration, responding to change, and continuous delivery of value.	Projects with evolving requirements, Dynamic environments
Scrum	A framework within Agile with defined roles, ceremonies, and artifacts.	Work is done in fixed-length iterations called sprints (typically 2-4 weeks). Includes Daily Scrums, Sprint Planning, and Sprint Reviews.	Rapid delivery through short cycles, structured team roles (Scrum Master, Product Owner, Development Team), and continuous inspection.	Teams wanting predictable delivery cycles & strong collaboration
Kanban	A visual system that focuses on managing and improving workflow.	Work is visualized on a Kanban board (e.g., To Do, In Progress, Done). Key is to limit Work in Progress (WIP).	Continuous flow, efficiency, and reducing bottlenecks by visualizing work and limiting WIP.	Support and maintenance teams, Teams needing flexible, continuous delivery

Testing Philosophies

These are approaches to how and when testing is performed in the Software Development Life Cycle (SDLC), often applied within Agile/DevOps models.

Methodology	Core Concept	Structure & Flow	Key Focus	Best For
Shift-left	Move testing earlier in the development lifecycle (to the "left" side of the SDLC timeline).	Testing starts during the requirements and design phases (e.g., unit tests, integration tests, security scanning by developers).	Catch defects early, Find and fix defects proactively when they are cheapest and easiest to resolve.	Projects focusing on faster feedback
Shift-right	Extend testing into the production environment (to the "right" side of the SDLC timeline).	Testing is performed after deployment using real user conditions (e.g., A/B testing, Canary releases, production monitoring, user feedback).	Gain insights into real-world performance and user experience to validate quality and behavior in a live environment.	post-deployment scenarios where the goal is to test and monitor software in a real-world production environment

Collaborative and Automation Methodology

DevOps is not just a process but a cultural and operational transformation that unites development and operations.

Methodology	Core Concept	Structure & Flow	Key Focus	Best For
Shift-left	Move testing earlier in the development lifecycle (to the "left" side of the SDLC timeline).	Testing starts during the requirements and design phases (e.g., unit tests, integration tests, security scanning by developers).	Catch defects early, Find and fix defects proactively when they are cheapest and easiest to resolve.	Projects focusing on faster feedback
Shift-right	Extend testing into the production environment (to the "right" side of the SDLC timeline).	Testing is performed after deployment using real user conditions (e.g., A/B testing, Canary releases, production monitoring, user feedback).	Gain insights into real-world performance and user experience to validate quality and behavior in a live environment.	post-deployment scenarios where the goal is to test and monitor software in a real-world production environment

ISTQB CTAL-TAE Test Automation Engineering Keys

 

(1) Introduction and Objective for Test Automation

Introduction - Purpose and benefits - Advantages and disadvantages - limitations  - Test Automation through SDLC - Select suitable Test Automation tools for given System Under Test (SUT) 

(2) Preparing for Test Automation

Configuration infrastructure to Enable Test Automation - Design for SUT testability - Test Automation across different Environments - Evaluation process for selecting tools and strategies - Analyze SUT to determine appropriate Test Automation Solution - Technical finding for tool evaluation 

(3) Test Automation Architecture

Generic Test Automation Architecture - Test Automation Architecture components - Design Test Automation Solution - TAF Layers - Automating Test cases Approaches - Design principles and design patterns in Test Automation

(4) Implementing Test Automation

Test Automation Development - Plan and deploy TA pilot  - Deployment risks and mitigation - TAS Maintainability 

(5) Implementing and Deployment Strategies for Test Automation

Integrate to CI/CD pipelines - Automated test execution across test levels - Configuration management for testware - Dependencies for API and contract testing 

(6) Test Automation Reporting and Metrics

Collecting Test Automation data from SUT and TAS - Analysis of TA data - Reporting and Dashboards

(7) Verifying the Test Automation Solution

Verify Test Automation infrastructure - Verify Test Automation components and environment - Verify test scripts and test suites - Test Automation root cause analysis for unexpected results  - Techniques to analyze Test Automation code for quality 

(8) Continuous Improvement

Data analysis for test case improvement - Improvements TAS and its components - Restructure Automated Testware to align with SUT updates - Use Test Automation Tools

Testing Tasks and Activities

Example of Requirement Traceability matrix (RTM)

Test Planning

Input: BRD/SRS/FSD/User Stories

Activities:

·       Review Context

·       Plan test activities

·       Identify and Analyze Risks

·       Support the selection and implementation of tools

·       Coordinate test plan with stakeholders

Output: Test plan (Test Objective, Test Approach, Test Scope, Test Resources, Test Schedules, Risk management, Test Deliverables)

Test Analysis

Input: BRD/SRS/FSD/User Stories, Test plan

Activities:

·       Review and analyze requirements

·       Identify and document test conditions

·       Capture traceability between Requirements and test conditions (Initiate traceability matrix)

Output: High Level Scenarios (Test Conditions)

Test Design

Input: Test Conditions

Activities:

·       Designing test cases

·       Identifying test data

·       Capture traceability between test conditions and test cases (update traceability matrix)

Output: Test Cases

Test Implementation

Input: Test Cases

Activities:

·       prioritizing test cases

·       Creating and Arranging test suites

·       Set Up the test environment

·       Prepare test data and load it in test environment

·       Create automated test scripts (if any)

Output: Test Suites, Test Environment, Test Data, Test Scripts (if any)

Test Execution

Input: Test Suites, Test Environment, Test Data, Test Scripts (if any)

Activities:

·       Executing manual test cases or automated test scripts

·       Comparing actual results with expected results

·       Reporting defects

·       Logging the outcome of test execution

·       Capture traceability between the test cases and test results (Verify and Update traceability matrix)

Output: Test Execution Logs, Test Results, Defects

Test Monitoring and Control

Input: Test Execution Logs, Test Results, Defects

Activities:

·       Monitoring and Control test activities

·       Introducing suitable metrics for measuring test progress

·       Checking test results and logs against specified coverage criteria

·       Determining if more tests are needed

Output: Test Progress Reports/Test Status Reports

Test Completion

Input: Test plan, Traceability matrix, Test Results, Defects, Test Status Reports

Activities:

·       Checking whether all defect reports are closed

·       Creating a test summary report

·       Document lessons learned

Output: Test Summary Report/Test Closure Report

مراحل تخطيط وتنفيذ مشروع نظام برمجي من المراحل الاولية حتي التسليم النهائي

المرحلة الأولي: ما قبل التعاقد (Pre-Contract / Pre-Sales)

هذه المرحلة تتضمن فهم متطلبات العميل أو تقديم عرض تنافسي للمناقصة المعروضة من قبل العميل

·       الدراسة الأولية للمتطلبات أو دراسة وثائق المناقصة (RFP/RFQ Initial Review)

·       اعداد العرض الفني والمالي (Technical and Financial Proposal)

·       المفاوضة والتعاقد (Negotiation and contracting)

المرحلة الثانية: التخطيط والتحليل (Planning and Analysis)

تبدأ هذه المرحلة بعد توقيع العقد، وتهدف إلى توثيق المتطلبات التفصيلية ووضع خريطة طريق مفصلة.

·       جمع وتوثيق المتطلبات التفصيلية (Requirements Gathering)

·       تحليل المتطلبات التفصيلية (Requirements Analysis)

·       مراجعة واعتماد المتطلبات (Requirements Review/Approval)

·       تخطيط المشروع التفصيلي (Detailed Project Plan)

المرحلة الثالثة: التصميم (Design)

هذه المرحلة تحول المتطلبات إلى تصميم يمكن تنفيذه

·       تصميم معمارية النظام (System Architecture)

·       تصميم قاعدة البيانات (Database Design/ Schema)

·       تصميم واجهات وتجربة المستخدم (UI/UX Design)

·       مراجعة واعتماد التصميم (Design Review/Approval)

المرحلة الرابعة: البناء والتطوير (Construction and Development)

هنا يتم بناء النظام البرمجي فعليًا، وهي غالبًا ما تكون المرحلة الأطول

·       اعداد بيئة ونموذج التطوير (SDLC Model/Environment)

·       كتابة ومراجعة الكود (Coding/ Code Review)

·       اختبار الوحدة (Unit Testing)

·       اختبار تكامل الوحدات (Components Integration Testing)

·       إدارة طلبات التغيير (Change Requests)

·       التكامل المستمر (Continuous Integration)

المرحلة الخامسة: الاختبار والجودة (Testing and Quality)

في هذه المرحلة يتم التركيز على اختبار جودة المنتج الموجه للعميل

·       اعداد بيئات الاختبار (Testing/Staging/Pre-production Environments)

·       اختبار النظام (System testing)

·       اختبار تكامل النظام (System Integration Testing SIT)

·       اختبار قبول المستخدم (User Acceptance Testing UAT)

·       الدمج المستمر في بيئات الاختبار (Continuous Deployment in Testing/ Staging)

·       التكامل/الدمج المستمر في بيئات ما قبل الإنتاج (CI/CD in Pre-Production)

المرحلة السادسة: النشر والتسليم (Deployment and Delivery)

في هذه المرحلة يتم نشر النظام وتسليمه الي العميل ومن ثم اطلاقه

·       اعداد بيئات الإنتاج (Production Environments)

·       التكامل المستمر/الدمج المستمر في بيئات الإنتاج (CI/CD Production Environment)

·       توثيق النظام واعداد ادلة المستخدم (Documentation and User Manuals)

·       تدريب المستخدمين على النظام (Training)

·       نشر وتشغيل النظام في بيئة الإنتاج (Deployment and Go-Live in Production)

·       مراقبة النظام بعد الاطلاق (Monitoring)

·       تسليم النظام ومخرجات المشروع للعميل (System and Packages Delivery)

·       موافقة التسليم النهائية (Final Sign-off)  

المرحلة السابعة: ما بعد التسليم (Post-Go-Live Support)

في هذه المرحلة يتم تأمين استمرارية عمل النظام بعد التسليم. كما تشمل ايضا تحديث وترقية النظام، وإضافة ميزات جديدة (غالبًا بموجب عقد منفصل).

·       الدعم الفني بعد التسليم خلال فترة الضمان (Corrective Support/Warranty Period)

·       عقود الصيانة والدعم المستمر (Continuous Maintenance and Support Contracts)

·       عقود إضافة ميزات وترقية (Modification/Upgrading Contracts)

·       التحسين المستمر (Continuous Improvement)