JTSi employs seasoned veteran Test Analysts, Test Engineers, and Systems Analysts to support clients conduct the full suite of testing events described below and required for large Information System (IS) programs and projects. JTSI’s extensive Test and Evaluation (T&E) experience includes assisting Government organizations conduct all testing for two of the largest Army Enterprise Resource Planning (ERP) and IS business systems. JTSi’s system testing approach leverages technical and functional veteran experts to provide detailed feedback and recommendations to our customers for improved enterprise business processes and more efficient and effective day-to-day customer mission operations.
Systems Testing
System Testing is the testing of a complete and fully integrated product. For large Information Systems, software is typically just one component of a large set of system hardware/software components that is ultimately interfaced with other system components. System Testing is accomplished with a series of different tests whose sole purpose is to exercise all components of the complete computer-based system.
There are two categories of Software Testing: White Box Testing and Black Box Testing
White box testing is the testing of the internal workings or code of a software application. In contrast, black box testing involves the external workings of the system from the user’s perspective.
Testing the fully integrated applications including external peripherals in order to check how components interact with one another and the whole system is called End-to-End testing.
Software Testing Hierarchy
Unit Testing
Integration Testing
System Testing
Acceptance Testing
As with almost any software engineering process, software testing has a prescribed order in which things should be done. The following is a list of software testing categories arranged in chronological order. These are the steps taken to fully test new software in preparation for marketing it:
- Unit testing – testing performed on each module or block of code during development. Unit Testing is normally done by the programmer who writes the code.
- Integration testing – testing done before, during and after integration of a new module into the main software package. This involves testing of each individual code module. One piece of software can contain several modules which are often created by several different programmers. It is crucial to test each module’s effect on the entire program model.
- System testing – testing done by a professional testing agent on the completed software product before it is introduced to the market.
- Acceptance testing – beta testing of the product done by the actual end users.
Different Types of System Testing
There are more than 50 types of System Tests. Below we have listed the typical types of system testing required for a large software development project.
- Usability Testing – Usability Testing mainly focuses on the user’s ease to use the application, flexibility in handling controls and ability of the system to meet its objectives
- Load Testing – necessary to know that a software solution will perform under real-life loads.
- Regression Testing – involves testing done to make sure none of the changes made over the course of the development process have caused new bugs. It also makes sure no old bugs appear from the addition of new software modules over time.
- Recovery Testing – Recovery testing is done to demonstrate a software solution is reliable, trustworthy and can successfully recoup from possible crashes.
- Migration Testing – Migration testing is done to ensure that the software can be moved from older system infrastructures to current system infrastructures without any issues.
- Functional Testing – Also known as functional completeness testing, Functional Testing involves trying to think of any possible missing functions. Testers might make a list of additional functionalities that a product could have to improve it during functional testing.
- Hardware/Software Testing – IBM refers to Hardware/Software testing as “HW/SW Testing”. This is when the tester focuses his/her attention on the interactions between the hardware and software during system testing.
