LDRA Technology
Articles related to LDRA Technology
Avionics
Going modular? Meet data and control coupling - Blog
June 10, 2015
CODE QUALITY BLOG: Since the dawn of the discipline of software engineering, one of the persistent mantras has been modularization. This structured design and functional decomposition approach breaks software down into clearly defined functional units, or modules, with unambiguous interfaces. The proven value of this approach is high quality software. When you go modular, however, software testing must examine the way that the modules come together and interact. This kind of testing is dubbed “data and control coupling.”
Avionics
Can Agile environments accelerate embedded software verification and certification? - Blog
January 27, 2015
CODE QUALITY BLOG: Although Agile development is being adopted by most software development organizations, most embedded developers, especially those seeking certification, continue to resist using Agile methodologies. Developers perceive more risks with an iterative Agile approach versus the traditionally regimented methodologies and artifacts required to achieve certification. Specific concerns stem from how requirements are captured in an Agile process, and how the test early-and-often principles of Agile development can be fulfilled prior to the embedded systems hardware being available.
Avionics
CODE QUALITY BLOG: Is 100 percent code coverage analysis essential? - Blog
November 19, 2014
CODE QUALITY BLOG: Safety-critical software standards focus very highly on how to test software effectively. They state that effective software testing requires a disciplined approach in which code coverage is used to provide feedback on the effectiveness of the testing to date. The level of testing rigor applied to a system must be driven by the impact of a system failure. The more significant the consequences, the more rigorous the testing has to be.
Avionics
Tool suite automates software verification, standards compliance - Product
November 16, 2014
Designers of safety-critical systems continue to look for ways to achieve full verification and even certification of multicore systems in a cost-effective manner as they are driven more and more by requirements to reduce size, weight, and power. LDRA experts are helping in this area with...
Avionics
CODE QUALITY BLOG: Is code coverage analysis necessary? - Blog
October 20, 2014
CODE QUALITY BLOG: When programmers discuss testing, a question that often comes up is how much is enough? Do I need to get 100 percent coverage? Let’s first address the elephant in the room: it’s impossible to fully test a piece of software. Don’t believe me? A 100-line program described by Glennford Myers in the 1976 book "Software Reliability: Principles and Practices" had as many as 1018 unique paths. In reality when you realize that contemporary software often exceeds hundreds of thousands, if not millions of lines of code and you quickly realize how impractical it is to completely test a piece of software.
Comms
Avionics
What's needed to ensure safety and security in UAV software - Story
July 31, 2013
UAVs are not like the remote control stunt plane you unwrapped on your 10th birthday. In their different guises they can be found in civil airspace or flying as integral players in military missions. That makes unmanned systems? safety and security very serious considerations. Accordingly, ISO 14508 and DO-178 could prove helpful in perpetuating safety and security for unmanned systems. Software tools that automate the processes required by these certification standards are easing the burden.
