5.2 Preparation procedure
Attention shall be paid that
(1) the prescription items related to safety are described clearly and are traceable.
Method A: requirements for functional safety are described in a separate chapter of the
hardware-software interface specification.
Method B: requirements for functional safety are clearly indicated by identification marks in the
hardware-software interface specification
(2) the details of a revision are described in the revision history as clearly as possible, when a revised
version is issued.
When the allotted space for the revision history is not enough, additional pages shall be added.
6. Issuance
6.1 Issuance route
(1) The Hardware-Software Interface Specification can be prepared by one of the following groups:
- Normal case: System Group
- Hardware Group (Example: System Group is not assigned)
- Software Group (Example: only software is delivered)
(2) The issuing group shall examine and review the hardware-software interface specification with the
other related groups and get the consensus before issuing and distributing it to other related groups.
6.2 Preparation timing
The Hardware-Software Interface Specification shall be prepared until
the Development Trial DR (SASG: K12-01A).
6.3 Issue method
(1) If the hardware-software interface specifications was not changed after issuance in a previous
development stage, it is not necessary to re-issue it again.
However, it is necessary to show clearly in the Design Sheet (SASG: K11-01B) or the Design Change
Notice (SASG: K16-01A) which hardware-software interface specification the system shall obey.
(2) If there is a change, a revised version shall be issued with updated revision history number (N,1,2,…).
(3) The System Gr. shall attach a software preparation request sheet (Software Order Sheet) when it
issues the hardware-software interface specification to the Software Gr.
6.3 Examination and approval
The Hardware-Software Interface Specification shall be examined by a Senior Engineer (or higher level),and shall be approved by a Managerial Engineer (or higher level).