The "Quick guide to safety management based on EN50126 / IEC 62278" is almost identical to this blog. In this way, you could print out the blog and have the same information.
If you are e.g. a Project manager, a Research and developing engineer or maybe a Purchaser and are just about to start a railway project, you might find it helpful to read the guide on book-form.
1) Brush up your safety management knowledge each time a new project starts
2) You can use it as a reference work, years after forgetting the blog link.
3) You will not be disturbed by the internet commercials.
4) The book can be read in the train on the way home.
5) You will read the content in the right sequence as suggested by the author with better pictures.
6) Bring it to your boss' office, when explaining the importance of EN 50126.
7) You save the time it takes to print out the entire blog.
8) Get a reference work of the buzz words used by the European Safety Authorities.
9) A few Examples and "Focus on the Source" chapters are removed from the blog.
10) An extra chapter about "Putting it all together".
Read more...
Viser opslag med etiketten Approval. Vis alle opslag
Viser opslag med etiketten Approval. Vis alle opslag
lørdag den 17. januar 2009
fredag den 16. januar 2009
Safety approval process
The approval process can be parted into three different types of approvals.
1) A "Generic Product (GP)" approval (the platform).
2) A "Generic Application (GA)" approval (the type).
3) A "Specific Application (SA)" approval (the installed product).
This is shown at Figure 9 in EN50129:2003, see below:
Interpretation
If e.g. Windows for PC was used as a railway product in e.g. a supervisory system, then the approval process could be parted into e.g.:
GP; the platform: This could e.g. be an American version of Windows, running on a PC.
GA; the type: This could e.g. be a Spanish version of Windows version, running on the platform PC.
SA; the installed product: This could e.g. be the Spanish Windows version physically installed at a supervisory centre at a site.
It works well in the theory, but it is difficult to part a complex system like Windows, a train or an interlocking system sharply into the three different systems definitions, GP, GA and SA.
Most often an approval process is connected to a contract concerning a specific application (SA). Everybody works hard to make the system ready and in this process the different System Definition's GP, GA and SA gets mixed with ambiguous interfaces.
But the basic idea is well-thought in order to approve a basic system in different country specific variants in the European countries and the parting should be strived towards.
Next chapter >> 3.1 EN 50126 key documents
Focus on the sources (EN 50129:2003)
Chapter 5.5.2, "Safety approval Process" describes the approval process. The approval concepts of GP, GA and SA are shown in EN50129:2003 at Figure 8 (see below and please excuse the quality).
Read more...
1) A "Generic Product (GP)" approval (the platform).
2) A "Generic Application (GA)" approval (the type).
3) A "Specific Application (SA)" approval (the installed product).
This is shown at Figure 9 in EN50129:2003, see below:
Interpretation
If e.g. Windows for PC was used as a railway product in e.g. a supervisory system, then the approval process could be parted into e.g.:
GP; the platform: This could e.g. be an American version of Windows, running on a PC.
GA; the type: This could e.g. be a Spanish version of Windows version, running on the platform PC.
SA; the installed product: This could e.g. be the Spanish Windows version physically installed at a supervisory centre at a site.
It works well in the theory, but it is difficult to part a complex system like Windows, a train or an interlocking system sharply into the three different systems definitions, GP, GA and SA.
Most often an approval process is connected to a contract concerning a specific application (SA). Everybody works hard to make the system ready and in this process the different System Definition's GP, GA and SA gets mixed with ambiguous interfaces.
But the basic idea is well-thought in order to approve a basic system in different country specific variants in the European countries and the parting should be strived towards.
Next chapter >> 3.1 EN 50126 key documents
Focus on the sources (EN 50129:2003)
Chapter 5.5.2, "Safety approval Process" describes the approval process. The approval concepts of GP, GA and SA are shown in EN50129:2003 at Figure 8 (see below and please excuse the quality).
Read more...
fredag den 9. januar 2009
How to choose an Assessor
The 1'st and 2'nd part in a railway contract can hire an assessor:
- The 1'st part will typically be a supplier, who wants to develop a railway system (a train, a level crossing, an LED lamp etc.) and
- The 2'nd part will typically be an Operator or Infrastructure owner, who wants to buy a railway system.
It is recommendable to choose an assessor in corporation with the Safety authority.
Interpretation
The assessor should have the capacity to perform the required assessor tasks.
The assessor should have the needed independency.
The assessor should have the needed competence.
There can be many candidates.
Please note an approval of a product can be parted into Generic Product (GP), Generic Application (GA) and Specific Application (SA).
Each approval step can have different assessors.
Add 1) For the GP it might be beneficial to use internal assessors as far as possible. If this is not accepted by the relevant safety authority, an external assessor can be hired to ensure the independency.
Add 2) For the GA and SA it might be beneficial to choose a local assessor or someone who is accepted by the local Safety Authority.
Add 3) For the SA it might only be necessary with an assessor for the first installed site.
Focus on the sources (EN 50129:2003)
See "Focus on the sources" in the referenced links.
Read more...
- The 1'st part will typically be a supplier, who wants to develop a railway system (a train, a level crossing, an LED lamp etc.) and
- The 2'nd part will typically be an Operator or Infrastructure owner, who wants to buy a railway system.
It is recommendable to choose an assessor in corporation with the Safety authority.
Interpretation
The assessor should have the capacity to perform the required assessor tasks.
The assessor should have the needed independency.
The assessor should have the needed competence.
There can be many candidates.
Please note an approval of a product can be parted into Generic Product (GP), Generic Application (GA) and Specific Application (SA).
Each approval step can have different assessors.
Add 1) For the GP it might be beneficial to use internal assessors as far as possible. If this is not accepted by the relevant safety authority, an external assessor can be hired to ensure the independency.
Add 2) For the GA and SA it might be beneficial to choose a local assessor or someone who is accepted by the local Safety Authority.
Add 3) For the SA it might only be necessary with an assessor for the first installed site.
Focus on the sources (EN 50129:2003)
See "Focus on the sources" in the referenced links.
Read more...
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