Online diagram tool open source mac os#
Online diagram tool open source software#

These reasons motivated us to write our own FTA editor: EMFTA, which is written using the Eclipse Modeling Framework (EMF) framework, the Sirius graphical framework, and Java code.

Online diagram tool open source mac os#

We wanted to make an FTA tool that is open-source, easy to use, available on most popular platforms (such as Windows, Mac OS and Linux), and that can be easily integrated in OSATE, our AADL modeling environment. While some open-source FTA projects do exist, they have limited capabilities and are not actively maintained, so that old bugs were not fixed and these program might not work on new operating systems

Online diagram tool open source software#

Licensing commercial tools is often expensive and beyond the budget for many researchers, so we wanted to create an open-source tool that was freely available to software developers of safety-critical systems. Unfortunately, most of them are released under a commercial license, which reduce their accessibility and evaluation to the research community. Several FTA tools are currently on the market. This type of failure model is helpful for manually analyzing system safety and computing the probability of a failure according to all of its contributors. A software error occurs if both of the following conditions are triggered (that is, the error events act as an AND gate): Software error (failure condition 3) is then refined into sub-events. The computer crashes if one of the following conditions is triggered (that is, the error events act as an OR gate): For example, a redundant system with two sensors will fail if both sensors are not working.ДЇigure 1 shows an FTA that represents the condition of a failure of a computer.

This representation captures the fact that a fault depends on several failures. The failure under analysis is the tree's root node and all related contributing factors are its leaf nodes.ДЇTA's logic includes gates that show the logical relationship (AND, OR) between error events in the tree. Unlike FMEA, which is a bottom-up method that shows the impact of every failure throughout the architecture, FTA defines a tree. In this blog post, I present the concepts of the FTA and introduce a new tool to design and analyze fault trees.ДЇTA is a top-down safety analysis method. One popular type of safety analysis is Fault Tree Analysis (FTA), which provides a graphical representation of all contributors to a failure (e.g., error events and propagations). Standards such as ARP4761 mandate several analyses, such as Functional Hazard Assessment (FHA) and Failure Mode and Effect Analysis (FMEA). For example, if you are producing a quadcopter drone, you would like to know the probability of engine failure to evaluate the system's reliability. Each potential error, failure, or defect must be considered and evaluated before you release a new product. Safety-critical software must be analyzed and checked carefully.