Collection to container. Parent to aliquot. Freezer position to final use. Every sample remains identifiable and accountable.

Sample management is the controlled stewardship of finite evidence. A sample must remain identifiable, locatable, suitable, available, and traceable from planned collection through every container, transfer, preparation, aliquot, test, shipment, hold, and final disposition.

Seal models physical custody and scientific lineage together. A freezer coordinate is useful only when the system also knows what the tube contains, where it came from, what happened to it, and whether it is still eligible for the intended use.

Study, batch, process step, subject or donor where applicable, matrix, timepoint, location, condition, quantity, container, tests, retention, backup, stability, shipping, priority, owner, and rationale define the planned sample.

Expected, collected, missed, replaced, cancelled, not applicable, and protocol-deviated states remain distinct.

Source object, collector, date and time, timezone, process position, subject or batch, quantity, unit, matrix, container, preservative, temperature, observations, deviations, and witness where required create the sample.

Preprinted identifiers are reserved and reconciled so unused, damaged, duplicate, or replaced labels cannot create phantom inventory.

Sample and container identifiers, human-readable text, barcode or data matrix, version, print event, printer, template, replacement, void, legibility, and verification remain controlled.

The label identifies the container; the database resolves its current state and permitted actions.

Collect, receive, verify, accession, transfer, store, retrieve, thaw, prepare, aliquot, pool, test, reserve, ship, return, consume, destroy, and correct events record actor, time, location, condition, quantity, reason, witness, source and destination.

Site, building, room, controlled area, unit, freezer, refrigerator, tank, rack, shelf, drawer, box, position, capacity, coordinate scheme, temperature range, qualification, calibration, alarm, access, and operational state form the hierarchy.

Each move updates occupancy atomically so two samples cannot be assigned the same exclusive position.

Container type, material, capacity, closure, sterility, additives, lot, compatibility, barcode, condition, current quantity, dead volume, freeze-thaw count, punctures, openings, contamination risk, and disposition remain connected to the sample.

Procedure, parent container, requested child count and volume, actual quantities, losses, residual, operator, equipment, tips or consumables, labels, conditions, time out of storage, verification, and exception define aliquoting.

Mass or volume balance must explain the parent, children, test use, process loss, and remaining inventory.

Pool purpose, contributing samples, source quantities, eligibility, homogenization, composite calculation, resulting container, residuals, excluded contributors, operator, verification, tests, and disposition remain traceable.

An unacceptable contributor can identify every pool and result it influenced.

Extraction, isolation, dilution, concentration, fixation, staining, digestion, culture, amplification, slide preparation, or other transformation records method, reagents, equipment, parameters, yields, conditions, parent objects, child objects, and suitability.

Identity, matrix, quantity, concentration, container, consent or protocol where relevant, storage, expiry, freeze-thaw, stability, quality, contamination, reservation, prior use, restrictions, and project authorization determine whether a sample can be selected.

Requester, project, purpose, criteria, exact or fungible sample, quantity, priority, needed date, approval, reservation, competing demand, substitution, partial fulfillment, cancellation, and release define allocation.

A reservation changes availability without pretending the sample has physically moved.

Pick list, route, storage state, scanned location, scanned container, quantity, condition, operator, witness, time out of storage, temporary location, discrepancies, completion, and handoff define retrieval.

Recipient, purpose, authorization, sample list, containers, packaging, refrigerant, logger, lane, carrier, tracking, ship time, receipt time, temperature data, seal, customs, discrepancy, excursion, acceptance, return, and closeout remain connected.

Requested test, method, laboratory, preparation, consumed quantity, residual, source container, child preparation, result, invalidation, repeat, return, remaining quantity, and closure determine current availability.

An invalid result does not restore sample that was physically consumed.

Storage unit, alarm, sensor, calibration, start, end, temperature, duration, affected positions, sample conditions, stability allowance, door events, backup transfer, evidence, assessment, decision, and corrective action define impact.

Expected and actual location, quantity, container, label, custody, condition, shipment content, receipt, sample state, discrepancy, search, correction, investigation, affected work, approval, and closure remain one record.

Sample class, study or batch state, protocol, consent, agreement, regulatory or legal hold, stability commitment, result status, last use, retention event, expiry, disposition method, authorization, witness, certificate, and inventory adjustment define end of life.

Seal is strongest where laboratory and biorepository samples cross inventory, equipment, storage monitoring, LIMS, ELN, clinical or manufacturing context, shipping, quality, and long-term retention. It owns physical custody and scientific parent–child lineage.

The first implementation should follow one limited parent sample from planned collection through accession, freezer placement, aliquoting, a pooled derivative, reservations by two studies, verified pick, external shipment with logger, testing and consumption, return of residual material, a freezer excursion, reconciliation, legal hold, and final disposition.

Include a damaged label, a missed planned sample, a quantity discrepancy, an ineligible aliquot, a competing reservation, a shipment excursion, and an invalid test that consumes the final prepared volume. The system must explain every physical and scientific consequence.