DO-178B

1. software planning process ==> 5 plans (PSAC, SDP, SVP, SCMP, SQAP) + 3 development standards (software requirements standards, software design standards, software code standards) A1 7 objectives ==> section 4

2. software development processes ==> section 5 ==> A2 7 objectives(Developer)

2.1 software requirements process ==> SRD (HLR)

2.2 software design process ==> DD (S/W Arch + LLR)

2.3 software coding process ==> Source Code - C/C++/Ada

2.4 software integration process ==> EOC (.exe)

machine level language <== assembler <== assembly level language ADD, MOV <== compiler <== high level language

3. software integral processes

3.1 software verification process ==> Reviews/Testing/Analysis - V&V (Tester)

3.2 software configuration management (SCM) process

3.3 software quality assurance (SQA) process

3.4 certification liasion process

SOI-1 planning
SOI-2 Development
SOI-3 verification
SOI-4 certification

Software Levels / Design Assurance Level (DAL):

Level A ==> catastrophic ==> 66 objectives (25 obj independence)
Level B ==> hazardous / severe major ==> 65 objectives (14 obj independence)
Level C ==> major ==> 52 objectives (2 obj independence)
Level D ==> minor ==> 28 objectives (2 obj independence)
Level E ==> no effect (0 objectives)

Independence: required for software verification process and software quality assurance process

all software quality assurance process objectives require independence
some software verification process objectives require independence for Level A and Level B; not required for Level C and Level D.

Stages of Involvement (SOI):

SOI-1 ==> plans review ==> 7/8 ==>SCM/SQA
SOI-2 ==> development review ==> 50% ==> 7/4 ==>SCM/SQA
SOI-3 ==> verification review ==> 50% ==> 40/2 ==>SCM/SQA
SOI-4 ==> final certification review ==> all objectives ==> grant certification

Software life cycle processes: (Section ==> Table objectives ==> outputs)

1. software planning process ==> section 4 ==> A1 7 objectives==> 8 outputs: 5 plans (PSAC, SDP, SVP, SCMP, SQAP) + 3 development standards (software requirements standards, software design standards, software code standards)

2. software development processes ==> section 5 ==> A2 7 objectives(Developer) ==> 4 outputs

2.1 software requirements process 2==> SRD (HLR)

2.2 software design process 3==> DD (S/W Arch + LLR)

2.3 software coding process 1==> Source Code - C/C++/Ada

2.4 software integration process 1==> EOC (.exe)

machine level language <== assembler <== assembly level language ADD, MOV <== compiler <== high level language

3. software integral processes: 52 objectives ==> 8 outputs

3.1 software verification process ==> section 6 ==> A3 to A7 40 objectives==> 2 outputs: SVCP, SVR ==> Reviews/Testing/Analysis - V&V (Tester)

3.2 software configuration management (SCM) process ==> section 7 ==> A8 6 objectives ==> 4 outputs (problem reports (PR), SCI, SLECI, SCM Records)

3.3 software quality assurance (SQA) process ==>section 8 ==> A9 3 objectives ==> 1 output: SQA records

3.4 certification liasion process ==> section 9 ==> A10 3 objectives ==>(PSAC, SCI, SAS)

SOI-1 planning
SOI-2 Development
SOI-3 verification
SOI-4 certification

software life cycle process

objectives ==> 66 objectives (A1 to A10)

activities

output ==> 20 outputs

system requirements + system architecture

HLR (SRD)

software architecture + LLR (DD)

Source Code

EOC

development traceability:

system req <--> HLR <--> LLR <--> SC

derived HLR

derived LLR

system safety assessment process / safety engineers

PSAC ==> Plan for software aspects of certification

SDP ==> Software development plan

SVP ==> software verification plan

SCMP ==> software configuration management plan

SQAP ==> software quality assurance plan

SRD ==> software requirements data

DD ==> design description

EOC ==> executable object code

SVCP ==> software verification cases and procedures

SVR ==> software verification Results

SCI ==> software configuration index

SLECI ==> software life cycle environment configuration index

SAS ==> Software Accomplishment Summary

--------------------------------

testing ==> TC - TP - EXECUTE - TR

TCA ==> RBTCA + SCA

problem reports ==> CCB ==> change control board ==> review

change management

version control ==> unique identification

Requirement ==> High Level Requirements HLR (Software Requirements Data SRD)

Design ==> Software Architecture + Low Level Requirements LLR (S/W Design Description DD/SDD)

Coding ==> C code (Source Code)

Integration ==> processor / controller ==> machine level language 10101110001111 (EOC - Executable Object Code)

DO-178B developed by RTCA and EUROCAE

EUROCAE ?

RTCA ?

year? DO-178B? 1992

DO-178C ==> 2011

66 objectives

coffee vending machine ==> avionics system

flight control system ==> avionics system

music/entertainment system ==> avionics system

software level ==> Design Assurance Level (DAL)

System Safety Assessment process ==> ARP-4761 ==> system engineers

Software Development Process:

systems requirements

software requirements process

HLR (SRD)

software Design Process

Software Architecture + LLR (DD)

software coding process

Source Code

software integration process

EOC

Questions:

what are the software life cycle processes?
what are the different software development processes?
what are the different software integral processes?
process ==> section ==> objectives ==> Table ==> outputs

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