{"id":394248,"date":"2024-10-20T04:13:09","date_gmt":"2024-10-20T04:13:09","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-97212021\/"},"modified":"2024-10-26T07:53:01","modified_gmt":"2024-10-26T07:53:01","slug":"bs-en-97212021","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-97212021\/","title":{"rendered":"BS EN 9721:2021"},"content":{"rendered":"

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
9<\/td>\n1 Scope
2 Normative references
3 Terms, definitions and abbreviations
3.1 Terms and definitions <\/td>\n<\/tr>\n
15<\/td>\n3.2 Abbreviations <\/td>\n<\/tr>\n
17<\/td>\n4 BITxe “BIT” stakeholders
4.1 BITxe “BIT” specifier
4.2 BITxe “BIT” designer\/developer
4.3 Operational user
4.4 Maintenance engineer <\/td>\n<\/tr>\n
18<\/td>\n4.5 System technical manager
4.6 Expert
4.7 Field data engineer
5 System constraints
5.1 System design <\/td>\n<\/tr>\n
19<\/td>\n5.2 BITxe “BIT” interface functionxe “function”
5.2.1 The alarmxe “alarm” functionxe “function” <\/td>\n<\/tr>\n
20<\/td>\n5.2.2 The diagnosticxe “diagnostic” functionxe “function”
5.2.3 Built-in reconfiguration
5.2.4 The maintenancexe “maintenance” functionxe “function”
5.2.5 The data recording for post analysis functionxe “function” <\/td>\n<\/tr>\n
21<\/td>\n5.3 System technical states
5.4 Functional modes of a systemxe “system”
5.5 System configurationxe “configuration”
5.5.1 Operational configurationxe “configuration” of a systemxe “system” <\/td>\n<\/tr>\n
22<\/td>\n5.5.2 Technical configurationxe “configuration”
5.5.3 BITxe “BIT” parameterisation <\/td>\n<\/tr>\n
23<\/td>\n6 BITxe “BIT” types and metrics
6.1 Generalxe “BIT”
6.2 The various types of BITxe “BIT”
6.2.1 Power-up BITxe “BIT” or Power-on BIT (PBITxe “PBIT”) <\/td>\n<\/tr>\n
24<\/td>\n6.2.2 Initiated BITxe “BIT” (IBIT) or Demanded BIT (DBIT)
6.2.3 Continuous BITxe “BIT” (CBIT)
6.2.4 External BITxe “BIT” (EBIT)
6.2.5 Maintenance BITxe “BIT” (MBIT) <\/td>\n<\/tr>\n
25<\/td>\n6.2.6 Summary of characteristics of the various types of BITxe “BIT”
6.3 The metrics
6.3.1 Role of the mathematical definitions of the metrics <\/td>\n<\/tr>\n
26<\/td>\n6.3.2 Detection rate
6.3.2.1 General
6.3.2.2 Failure detectionxe “detection” capability (FDCxe “FDC”)
6.3.2.3 Failure detectionxe “detection” probability (FDPxe “FDP”) <\/td>\n<\/tr>\n
27<\/td>\n6.3.2.4 Comment <\/td>\n<\/tr>\n
28<\/td>\n6.3.3 Isolation rate
6.3.3.1 Diagnostic and isolationxe “isolation” <\/td>\n<\/tr>\n
29<\/td>\n6.3.3.2 Failure isolationxe “isolation” probability (FIPxe “FIP”) <\/td>\n<\/tr>\n
30<\/td>\n6.3.3.3 Failure resolution probability (FRPxe “FRP”)
6.3.3.4 When is it more relevant to use the FIPxe “FIP” or FRPxe “FRP”? <\/td>\n<\/tr>\n
31<\/td>\n6.3.4 Unreliabilisation rate caused by the BITxe “BIT”
6.3.5 False alarmxe “alarm” rates, false correct operation rates
6.3.5.1 General <\/td>\n<\/tr>\n
32<\/td>\n6.3.5.2 Sensitivity and Specificity <\/td>\n<\/tr>\n
33<\/td>\n6.3.5.3 Diagnostic value <\/td>\n<\/tr>\n
34<\/td>\n6.3.5.4 Calculating the false alarmxe “false alarm” rate <\/td>\n<\/tr>\n
36<\/td>\n7 Use of BITxe “BIT”
7.1 During development
7.2 During production <\/td>\n<\/tr>\n
38<\/td>\n7.3 During service
7.3.1 In operational modexe “mode”
7.3.2 In maintenancexe “maintenance” modexe “mode”
7.4 During validation during repair
8 Architecture of the BITxe “BIT”
8.1 The generic functions of the BITxe “BIT”
8.1.1 Generalxe “function” <\/td>\n<\/tr>\n
40<\/td>\n8.1.2 BITxe “BIT” Detection functionxe “function”
8.1.2.1 General
8.1.2.2 Test
8.1.2.3 Confirmation (optional)
8.1.3 BITxe “BIT” Supervisor functionxe “function”
8.1.3.1 Generalxe “diagnostic” <\/td>\n<\/tr>\n
41<\/td>\n8.1.3.2 Operational diagnosticxe “diagnostic”
8.1.3.3 Context recording (optional):
8.1.3.4 System date (optional):
8.1.3.5 Maintenance diagnosticxe “diagnostic” (optional) <\/td>\n<\/tr>\n
42<\/td>\n8.1.3.6 Data recording (optional)
8.1.3.7 Interface
8.1.3.8 Control of the BITxe “BIT” triggered (optional) <\/td>\n<\/tr>\n
43<\/td>\n8.1.3.9 Inhibition (optional)
8.1.3.10 BITxe “BIT” parameterisation (optional)
8.2 The various architectures of the BITxe “BIT” functionxe “function”
8.2.1 General <\/td>\n<\/tr>\n
44<\/td>\n8.2.2 Distributed BITxe “BIT” Architecture
8.2.3 Centralised BITxe “BIT” Architecture <\/td>\n<\/tr>\n
45<\/td>\n8.2.4 Choice of BITxe “BIT” architecture <\/td>\n<\/tr>\n
46<\/td>\n8.3 Exchanged data typology <\/td>\n<\/tr>\n
47<\/td>\n8.4 Specification process
8.4.1 System design arbitrations: Essential objective and effort <\/td>\n<\/tr>\n
49<\/td>\n8.4.2 The BITxe “BIT” specification process
8.4.2.1 General
8.4.2.2 For the BITxe “BIT” architecture
8.4.2.3 For the tests <\/td>\n<\/tr>\n
50<\/td>\n8.5 Generic modelling and configurationxe “configuration” language
8.5.1 Introduction <\/td>\n<\/tr>\n
52<\/td>\n8.5.2 General information
8.5.2.1 Introduction
8.5.2.2 BITxe “BIT” modelxe “model” applications
8.5.2.3 Utilities <\/td>\n<\/tr>\n
53<\/td>\n8.5.2.4 Constraints
8.5.3 Description of the language tables
8.5.3.1 Generalxe “failure”
8.5.3.2 Table of services in failurexe “failure” <\/td>\n<\/tr>\n
54<\/td>\n8.5.3.3 Table of Cut sets <\/td>\n<\/tr>\n
55<\/td>\n8.5.3.4 Table of Signatures <\/td>\n<\/tr>\n
57<\/td>\n8.5.3.5 Table of Cut sets\/Signatures <\/td>\n<\/tr>\n
58<\/td>\n8.5.3.6 Table of Direct dependencies: <\/td>\n<\/tr>\n
59<\/td>\n8.5.3.7 Table of Degradation levels
8.5.4 Functional language
8.5.4.1 The operators
8.5.4.2 Words dedicated to the language
8.5.5 Model instantiation process <\/td>\n<\/tr>\n
60<\/td>\n8.6 Development process and validation\/verification of a BITxe “BIT” systemxe “system”
9 Prognosis
9.1 Aim of the prognosis <\/td>\n<\/tr>\n
61<\/td>\n9.2 Organisation of the prognosis
9.3 Data from BITxe “BIT” for use by the Prognosis
10 Conclusions <\/td>\n<\/tr>\n
63<\/td>\nAnnex A (informative)Examples
A.1 Operational efficiency and performancexe “performance”
A.1.1 General
A.1.2 Example 1: How do you cut down a tree rapidly?
A.1.3 Example 2: How do you cut a slab of butter cleanly? <\/td>\n<\/tr>\n
64<\/td>\nA.2 Example of calculations for some metrics
A.2.1 General <\/td>\n<\/tr>\n
68<\/td>\nA.2.2 Calculating detectionxe “detection” rates
A.2.2.1 Calculating the FDCxe “FDC” (Failure Detection Capability) <\/td>\n<\/tr>\n
69<\/td>\nA.2.2.2 Calculating the FDPxe “FDP” (Failure detectionxe “detection” probability) <\/td>\n<\/tr>\n
70<\/td>\nA.2.3 Calculating isolationxe “isolation” rates <\/td>\n<\/tr>\n
71<\/td>\nA.2.3.1 Calculating the FIPxe “FIP”n (Failure isolationxe “isolation” probability) <\/td>\n<\/tr>\n
72<\/td>\nA.2.3.2 Calculating the FRPxe “FRP”n (Failure resolution probability) <\/td>\n<\/tr>\n
76<\/td>\nA.3 Correct operation diagnosticxe “diagnostic” vs failurexe “failure” diagnostic <\/td>\n<\/tr>\n
77<\/td>\nA.4 Example of propagation of the diagnosticxe “diagnostic” values on a simple architecture case <\/td>\n<\/tr>\n
84<\/td>\nA.5 Ergodicity hypothesis
A.6 Example of calculation for assessing the NFFxe “NFF” \u2014 No faultxe “fault” found rate <\/td>\n<\/tr>\n
86<\/td>\nA.7 Timing chart of events <\/td>\n<\/tr>\n
88<\/td>\nAnnex B (informative)List of recommendations <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Aerospace series. General recommendation for the BIT Architecture in an integrated system<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2022<\/td>\n94<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":394256,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-394248","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/394248","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/394256"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=394248"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=394248"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=394248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}