arcadia 7;
project alarm_response "Alarm response" {
    description "A complete small OA/SA source-authoring example. Numerical annotations are descriptive.";

    oa_actor plant_operator "Plant operator" {}
    oa_entity maintenance "Maintenance team" {}
    oa_activity manage_alarm "Manage a pressure alarm" {
        oa_activity detect_alarm "Detect alarm" {}
        // Assessing the alarm is work decomposition, independently allocated below.
        oa_activity assess_alarm "Assess alarm" {}
    }
    oa_capability safe_response "Respond safely" {}
    oa_exchange_item alarm_report "Alarm report" {
        mechanism Flow;
        oa_data_field reported_pressure "Reported pressure" {
            type_ref Real;
            unit "kPa";
        }
    }
    allocation operator_detects "Operator detects" {
        source @plant_operator; target @detect_alarm;
    }
    allocation team_assesses "Team assesses" {
        source @maintenance; target @assess_alarm;
    }
    interaction alarm_message "Pressure alarm report" {
        source @detect_alarm; target @assess_alarm; items [@alarm_report];
    }
    capability_involvement assessment_supports_response "Assessment supports safe response" {
        source @assess_alarm; target @safe_response;
    }

    oa_process triage "Alarm triage" {
        steps [@detect_once, @assess_once];
        oa_occurrence detect_once "Detect this alarm" {
            body { Action { action @detect_alarm; lifeline none; }; };
        }
        oa_occurrence assess_once "Assess this alarm" {
            body { Action { action @assess_alarm; lifeline none; }; };
        }
    }
    sequence_link assessment_after_detection "Assess after detecting" {
        source @detect_once; target @assess_once;
    }
    chain_involvement triage_supports_response "Triage supports safe response" {
        source @triage; target @safe_response;
    }

    oa_scenario notification "Alarm notification" {
        viewpoint OperationalActivity;
        context @safe_response;
        steps [@notify_once];
        oa_lifeline detector_line "Detector" { represented @detect_alarm; }
        oa_lifeline assessor_line "Assessor" { represented @assess_alarm; }
        oa_occurrence notify_once "Report this pressure" {
            body { Exchange {
                exchange @alarm_message; sender @detector_line; receiver @assessor_line;
                message_kind Asynchronous; reply_to none;
                values [{ field @reported_pressure; path []; expression "420"; }];
            }; };
        }
    }

    sa_system alarm_console "Alarm console" {
        sa_state_machine console_status "Console status" {
            sa_region console_region "Main region" {
                sa_initial console_start "Start" {}
                sa_state console_ready "Ready" {}
                sa_state console_alerting "Alerting" {}
            }
        }
    }
    sa_function classify_alarm "Classify alarm" {}
    sa_functional_chain classification_flow "Alarm classification" {
        steps [@classify_once];
        sa_occurrence classify_once "Classify this alarm" {
            body { Action { action @classify_alarm; lifeline none; }; };
        }
    }
    allocation console_classifies "Console classifies" {
        source @alarm_console; target @classify_alarm;
    }
    sa_event alarm_received "Alarm received" {}
    state_transition initialize_console "Initialize" {
        source @console_start; target @console_ready;
    }
    state_transition display_alarm "Display alarm" {
        source @console_ready; target @console_alerting; triggers [@alarm_received];
    }
    trace assessment_refinement "Alarm classification refines assessment" {
        oa @assess_alarm; sa @classify_alarm;
        baseline {
            oa { name "Assess alarm"; description ""; };
            sa { name "Classify alarm"; description ""; };
        };
    }
    artifact response_procedure "Response procedure" {
        owner @assess_alarm; uri "procedures/alarm-response.md"; revision "review-1";
    }

    diagram response_view "Operational work" { projection FunctionalDataflow; }
    node detector_card {
        diagram @response_view; element @detect_alarm;
        position { x 40; y 40; };
    }
    node assessor_card {
        diagram @response_view; element @assess_alarm;
        position { x 400; y 40; };
    }
}