DO-178C
DO-178C, Software Considerations in Airborne Systems and Equipment Certification is the title of the recently published document from RTCA, Incorporated, in a joint effort with EUROCAE. This replaces DO-178B as the primary document by which the certification authorities such as FAA, EASA and Transport Canada will approve all commercial software-based aerospace systems. The new document is called DO-178C/ED-12C and was completed in November 2011 and approved by the RTCA in December 2011. It became available for sale and use in January 2012.
The FAA approved AC 20-115C on 19 Jul 2013, making DO-178C a recognized "acceptable means, but not the only means, for showing compliance with the applicable airworthiness regulations for the software aspects of airborne systems and equipment certification."
Background
Since the release of DO-178B, there have been strong calls by DERs (FAA Designated Engineering Representatives) for clarification/refinement of the definitions and boundaries between the key DO-178B concepts of high-level requirements, low-level requirements, and derived requirements and a better definition of the exit/entry criteria between systems requirements and system design (see ARP4754) and that of software requirements and software design (which is the domain of DO-178B). Other topics such as what does verification mean in a model-based development paradigm and can model simulation or formal methods replace some or all software testing activities. The release of DO-178C and the companion documents DO-278A (Ground Systems), DO-248C (Additional information with rational for each DO-178C objective), DO-330 (Tool Qualification), DO-331 (Modeling), DO-332 (Object Oriented), and DO-333 (Formal Methods) were created to address the issues noted. The SC-205 members worked with the SAE S-18 committee to assure that APR4754A and the above noted DO-xxx documents provide a unified and linked process with complementary criteria.
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Never Far Away
by: Take 5Everything I do Is all done for you
Lady I'm yours
And everywhere I go
You're always on my mind
You're all I adore
And I'll go
Outta my way
Just to assure
That our love endures I'm yours
Girl I'm never far away I'll be right there (right there)
To keep you nice and warm I'm rushing right home
Girl I'm never far away I'll be right there (right there)
To protect you from the storm I'm rushing right home
Girl I'll be there I'll be right there
I don't need you say
That I love you
A million times a day
Just the little things I do
All done for you
That's how I display
Love
And I'll go
Out of my way
Just to assure you baby
That our love endures I'm yours
Girl I'm never far away I'll be right there (right there)
To keep you nice and warm
(Girl I'll keep you nice and warm,
You know I'll keep you nice and warm
You know I'll keep you nice and warm)
Girl I'm never far away I'll be right there (I'll be right there)
To protect you from the storm I'm rushing right home
Girl I'll be there I'll be right there
You don't have to go and check my pager
Check my phone and search my pants to figure me out (ha)
Cause I'm an honest man
Don't need a plan, a stronger man
Cause girl there is no doubt
My love's real (as real as it comes)
Even though we are a million miles away from each other
I'm still right here, right here for you
(Here for you, here for you) I could search a million years
And still I wouldn't find anyone as beautiful as you
So rest assured our love endures I'm never far away...
(I'm rushing home baby, I'm coming home baby) I'm never far away...
(I'm rushing home baby, home baby, home baby) I'm never far away...
(I'm rushing home baby, I'm coming home baby) I'm never far away...
(I'm rushing home baby, home baby, home baby) I'm never far away...
(I'm rushing home baby, I'm coming home baby) I'm never far away...
(I'm rushing home baby, home baby, home baby) I'm never, never, never, never far Never, never, never, never far
Never far, never far I'm never far away I'm never far away...
(I'm rushing home baby, I'm coming home baby) I'm never far away...
(I'm rushing home baby, home baby, home baby) I'm never far away...
(I'm rushing home baby, I'm coming home baby) I'm never far away...
(I'm rushing home baby, home baby, home baby) I'm never far away...
(I'm rushing home baby, I'm coming home baby) I'm never far away...
(I'm rushing home baby, home baby, home baby) I'm never, never, never, never far Never, never, never, never far