Why plan census across multiple sites?

Biotech and pharma companies often run vivarium operations at multiple locations — a breeding facility, an in-life study site, and a CRO. Animals transfer between sites for studies, breeding expansion, or overflow capacity. Without a unified plan, sites can exceed capacity or miss quarantine requirements.

What quarantine periods are typical for rodent transfers?

Standard quarantine for incoming rodents is 5–14 days depending on SPF status and health monitoring program. Same-barrier transfers within an institution may use shorter quarantine (3–5 days). Cross-institutional or international transfers typically require 7–14 days plus health certification.

How does the planner handle study-based census changes?

Study events add cages at a site for the duration of the study. When a study starts, cages are added to that site's census. When the study ends, those cages are released. This lets you see how concurrent studies at a site affect total cage load over time.

What counts as a capacity violation?

A capacity violation occurs when total cage load (regular census + quarantine cages) exceeds the site's rated cage capacity. The planner flags every week where this occurs, helping you identify bottlenecks and plan transfers or study timing to avoid overcrowding.

ToolsConductScience tool

Biotech / PharmaFree in-browser calculator

Multi-Site Census Planner.

Track animal inventory across vivarium sites, plan inter-site transfers with quarantine windows, and flag capacity violations week by week.

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Validated2026-04-08

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Projection Settings

Start date *

Horizon (weeks)

Quarantine (days)

Sites

Name *

Capacity (cages)

Current census

Transfers

No transfers planned.

Studies

No studies planned.

Required fields

Site 1: name is required.
Site 1: cage capacity must be at least 1.
Start date must be YYYY-MM-DD format.

When to use

Multi-site vivarium capacity planning
Inter-site transfer scheduling with quarantine windows
Study-level cage demand forecasting across locations
CRO–sponsor animal transfer coordination

Do not use for

Single-site census forecasting (use Multi-Strain Census Forecaster)
Room-level space planning within one site (use Vivarium Space Planner)
Breeding colony projection (use Colony Expansion Forecaster)

Pearl

Always include quarantine cages in your capacity calculation. A site at 90% capacity can overflow when a 20-cage transfer arrives with a 14-day quarantine hold.

Pearl

Plan transfers during low-census weeks. Check the weekly projection to identify windows where the receiving site has spare capacity.

Pitfall

Do not schedule back-to-back transfers to the same site — quarantine from the first transfer may still be active when the second arrives, creating a cascade of capacity violations.

Pitfall

International transfers may need 2–6 weeks of lead time for health certificates and customs. Add buffer time to your transfer dates.

Method

Starting from each site's current census, the planner projects week-by-week cage load by applying: (1) transfer events (subtract from source, add to destination), (2) study events (add cages during active study period), (3) quarantine overlays (transfer cages in quarantine count toward receiving site load for the quarantine period). Capacity violations are flagged when total load (census + quarantine) exceeds site capacity.

Validated

Last validated 2026-04-08. Calculations are designed for planning and documentation support; verify procurement decisions against manufacturer specifications or institutional SOPs.

How to cite

How to Cite

ConductScience Multi-Site Census Planner (v1.24.0). ConductScience. https://conductscience.com/tools/multi-site-census-planner

Guide for the Care and Use of Laboratory Animals, 8th ed. National Research Council (2011).

Managing Multi-Site Vivarium Operations

Organizations with multiple vivarium sites face unique challenges in census management:

Capacity balancing: Sites have different cage capacities and utilization rates. Transfers can relieve an overcrowded site but may push the receiving site over capacity if not planned carefully — especially when quarantine cages are factored in.

Quarantine impact: Incoming transfers require quarantine space that temporarily increases cage load. A 10-cage transfer with 14-day quarantine effectively occupies 10 additional cages for two weeks. The planner accounts for this overlap.

SPF status maintenance: Transfers between sites with different specific-pathogen-free (SPF) statuses require careful biosecurity planning. Animals moving from a lower to higher SPF barrier need extended quarantine and health testing.

Study scheduling: Multi-site studies often involve breeding at one site, in-life work at another, and necropsy at a third. Coordinating animal flow across these sites requires tracking census at each location week by week.

Regulatory considerations: International transfers add customs clearance, health certificates, and import permits. These can add 2–6 weeks to transfer timelines and should be factored into planning.

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Pearl

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How to cite

How to Cite

Managing Multi-Site Vivarium Operations

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Multi-Strain Census Forecaster

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