Functional Area Catalogue¶

Inventory of capacity domains, operational constraints and associated conversion archetypes.

Row	Functional Area	Conversion Archetype	Operational Constraint	Primary Workload Object	Output Type
1	BAYS_AE	flow-space occupancy	concurrent occupancy over operational periods	occupancy_hours	bays
2	BEDS_AE	flow-space occupancy	concurrent occupancy over operational periods	occupancy_hours	beds
3	BEDS_CRITICAL_CARE	bed occupancy	continuous occupancy over 24-hour operational periods	critical_care_bed_days	beds
4	BEDS_DAYCASE_ENDOSCOPY_RECOVERY	recovery occupancy	temporary occupancy with intra-day turnover	occupancy_hours	beds
5	BEDS_DAYCASE_RECOVERY	recovery occupancy	temporary occupancy with intra-day turnover	occupancy_hours	beds
6	BEDS_DAYCASE_RENAL	session capacity	treatment session throughput per bed per operational day	treatment_sessions	beds
7	BEDS_INPATIENT_ASSESSMENT	bed occupancy	continuous occupancy over 24-hour operational periods	assessment_bed_days	beds
8	BEDS_INPATIENT_WARD	bed occupancy	continuous occupancy over 24-hour operational periods	ward_bed_days	beds
9	BEDS_MATERNITY_ASSESSMENT	recovery occupancy	temporary occupancy with intra-day turnover	occupancy_hours	beds
10	BEDS_MATERNITY_WARD	bed occupancy	continuous occupancy over 24-hour operational periods	ward_bed_days	beds
12	LABS_CARDIAC_CATH_PROC	time utilisation	schedulable procedural operating time	procedure_hours	laboratories
13	ROOMS_ENDOSCOPY_PROC	time utilisation	schedulable procedural operating time	procedure_hours	rooms
14	ROOMS_INT_RADIOLOGY_PROC	time utilisation	schedulable procedural operating time	procedure_hours	rooms
15	ROOMS_MATERNITY_BIRTH	bed occupancy	continuous occupancy over 24-hour operational periods	birth_room_bed_days	rooms
16	ROOMS_OUTPATIENT_CONSULT	appointment utilisation	schedulable clinic consultation time	consultation_hours	rooms
17	ROOMS_OUTPATIENT_PROC	appointment utilisation	schedulable procedure room time	procedure_hours	rooms
18	ROOMS_OUTPATIENT_VIRTUAL_CONSULT	appointment utilisation	schedulable clinic consultation time	consultation_hours	rooms
19	SPACES_HAEM_ONC	treatment-time utilisation	schedulable treatment-space time	treatment_hours	spaces
20	SPACES_SDEC	flow-space occupancy	concurrent occupancy over operational periods	occupancy_hours	spaces
21	THEATRES_DAYCASE_PROC	time utilisation	schedulable procedural operating time	procedure_hours	theatres
22	THEATRES_INPATIENT_PROC	time utilisation	schedulable procedural operating time	procedure_hours	theatres
23	THEATRES_OBSTETRIC_PROC	time utilisation	schedulable procedural operating time	procedure_hours	theatres

For three functional areas there is a plausible argument for a different archetype.

BEDS_INPATIENT_ASSESSMENT hinges on whether an assessment unit is operationally best viewed as a temporary flow-through area or an inpatient bed base. Given many assessment units keep patients overnight, accommodate stays exceeding 24 hours, and function as admission avoidance wards, the bed occupancy archetype was selected as the safer default (rather than recovery occupancy). This does make it out-of-step with BEDS_MATERNITY_ASSESSMENT, although average maternity assessment stays are likely to be shorter in duration.

ROOMS_MATERNITY_BIRTH could be represented using a flow-space occupancy approach, as birth activity is naturally expressed as spells multiplied by labour duration. However, birthing rooms are typically occupied continuously by an individual patient, occupancy commonly spans shifts and midnight boundaries, and operational discussions are usually framed in terms of room occupancy rather than throughput. For these reasons the bed occupancy archetype was selected as the most natural operational representation.

BEDS_DAYCASE_RENAL could potentially be modelled using a treatment-time utilisation archetype. However, current service planning assumptions are expressed in terms of treatment sessions per bed/chair per day and annual session throughput. As capacity discussions are typically framed around session capacity rather than treatment duration and utilisation, the session capacity archetype was selected.