Master and Working Cell Bank Management SOP (ICH Q5D)
Master and Working Cell Bank Management SOP (ICH Q5D) template for controlling generation, storage, labeling, inventory, and release of cell banks used in biologics production.
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Built for: Biologics Manufacturing · Cell And Gene Therapy · Pharmaceutical Quality Control · Contract Development And Manufacturing Organizations
Overview
This SOP template defines the controlled workflow for managing master cell banks and working cell banks used in biologics production. It covers authorization checks, cryostorage condition review, label and traceability verification, physical inventory reconciliation, discrepancy decisions, escalation, quarantine, usage or transfer logging, and final review. The structure is designed to produce a documented record that shows the bank status, who checked it, what was verified, and what action was taken when something did not match.
Use this template when your site needs a repeatable process for bank control, especially before material is issued to manufacturing, after a freezer alarm or maintenance event, during scheduled inventory audits, or when replenishing bank stock. It is also useful when multiple roles touch the same bank material and you need a single SOP to prevent identity errors, undocumented movement, or use of material with an unclear status.
Do not use this template as a generic warehouse checklist or for unrelated sample storage. It is not intended for routine environmental monitoring alone, nor for procedures that do not require traceability to a controlled cell bank log. If your operation does not maintain master and working cell banks, or if the material is not part of a regulated biologics process, the procedure should be simplified or replaced with a more appropriate inventory control SOP.
Standards & compliance context
- The template supports ISO 9001-style documented information control by requiring traceable records, review, and closure.
- It aligns with ICH Q5D expectations for cell substrate management by emphasizing identity, history, and controlled storage of master and working cell banks.
- The verification and non-conformance steps support GMP-oriented quality systems that require status control, deviation handling, and quarantine of suspect material.
- Where cryogenic hazards or hazardous procedures are involved, the SOP can be paired with site safety controls, PPE requirements, and permit-to-work rules.
General regulatory context for orientation only — verify current requirements with counsel or the relevant agency before relying on this template for compliance.
What's inside this template
Steps
This section matters because it turns cell bank control into a repeatable sequence with clear roles, verification points, and escalation triggers.
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Verify authorization and current cell bank status
The QC Technician verifies documented authorization, confirms whether the material is a master cell bank (MCB) or working cell bank (WCB), and checks the current status in the controlled record before any handling begins.
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Inspect cryostorage conditions
The QC Technician checks the cryostorage unit temperature, alarm status, and rack location against approved limits and records any abnormal condition before proceeding.
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Confirm label identity and traceability
The QC Technician confirms that each container label matches the controlled record, including bank type, unique identifier, passage or lot reference, and storage location.
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Reconcile physical inventory against the controlled log
The Inventory Control Specialist compares the physical count and location of vials against the controlled inventory record and documents any mismatch for review.
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Decision: determine whether a discrepancy or excursion exists
The Laboratory Supervisor reviews the objective evidence and routes the record to the correct next action based on whether all checks are within tolerance.
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Escalate the non-conformance and quarantine affected material
The Quality Assurance Specialist quarantines affected material, opens the deviation, and notifies QA or the competent person for disposition.
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Record usage, transfer, or replenishment activity
The Inventory Control Specialist records any movement or consumption of MCB or WCB material with date, time, role, quantity, and destination in the controlled log.
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Obtain final review and close the record
The Laboratory Supervisor reviews the completed record, confirms that all required documentation is present, and closes the record when no unresolved deviations remain.
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Perform post-thaw viability assay
The QC Technician performs the approved post-thaw viability assay on representative samples and confirms the viability acceptance criterion is met (≥85%) before the bank is released for further testing or use.
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Perform sterility and mycoplasma testing
The QC Technician submits representative samples for sterility and mycoplasma testing using validated methods and records the test identifiers and incubation or turnaround requirements.
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Review test results and disposition the bank
The Quality Assurance Specialist reviews viability, sterility, and mycoplasma results against acceptance criteria and documents whether the bank is released, quarantined, or rejected.
How to use this template
- The authorizer verifies that the request is approved and that the cell bank status is current before any inventory check begins.
- The operator inspects the cryostorage conditions and records any excursion, alarm, or abnormal condition against the defined tolerance.
- The operator confirms each container label, bank identifier, passage or lot reference, and traceability link against the controlled log.
- The operator reconciles the physical count and location of vials against the inventory record and flags any deviation immediately.
- The reviewer determines whether a discrepancy or excursion exists, quarantines affected material if needed, and closes the record after final review.
Best practices
- Verify authorization before opening the freezer or handling any bank vial so the record reflects an approved activity.
- Record the exact storage location, container ID, and bank status at the time of inspection rather than reconstructing it later.
- Treat any label mismatch, missing vial, or unreadable identifier as a deviation until a competent person confirms the status.
- Quarantine affected material immediately when an excursion or inventory discrepancy cannot be resolved on the spot.
- Use one controlled source of truth for the inventory log and do not rely on memory, informal notes, or email threads.
- Capture the date, time, role, and verification outcome for each step so the record supports traceability and review.
- Define escalation criteria for freezer alarms, temperature excursions, and unexplained count differences before the SOP is issued.
What this template typically catches
Issues teams running this template most often surface in practice:
Common use cases
Frequently asked questions
What does this SOP template cover?
This template covers the controlled handling of master cell banks and working cell banks, including authorization checks, cryostorage review, label verification, inventory reconciliation, discrepancy decisions, escalation, and record closure. It is written for biologics operations that need traceability from bank creation through use and replenishment. It also supports quarantine and non-conformance handling when an excursion or mismatch is found.
Who should run this procedure?
A trained quality, manufacturing, or cell culture operations role should execute the procedure, with a competent person reviewing any discrepancy or release decision. In practice, the operator performs the checks and inventory reconciliation, while QA or a designated reviewer confirms closure. Sites should assign the role based on their quality system and segregation of duties.
How often should cell bank inventory be checked?
Use the SOP on the cadence defined by your site control plan, such as after receipt, before use, after transfer, after replenishment, and during scheduled inventory reviews. The template is also suitable for event-driven checks after a freezer alarm, maintenance event, or unexplained stock variance. The right frequency depends on risk, bank criticality, and storage configuration.
How does this template support regulatory expectations?
It supports documented information control, traceability, and deviation handling expected under quality systems such as ISO 9001 and biologics-focused controls aligned with ICH Q5D. It also fits GMP-style expectations for identity, status labeling, and controlled inventory. If your operation handles hazardous materials or cryogenic systems, the review and escalation steps help reinforce safe handling and documented response.
What are the most common mistakes this SOP helps prevent?
Common failures include unlabeled vials, mismatched lot or passage identifiers, missing inventory counts, and late escalation after a temperature excursion. Another frequent issue is using bank material before the controlled log is updated or before status is confirmed. This template forces verification before use and creates a clear non-conformance path when something does not match.
Can I customize the template for our facility and systems?
Yes. You can add your own bank naming convention, storage map, inventory log fields, approval roles, and escalation thresholds for excursions or discrepancies. Many teams also tailor the record to match their LIMS, eQMS, or freezer monitoring system. Keep the verification points, traceability fields, and quarantine logic intact when customizing.
Does this integrate with LIMS, eQMS, or freezer monitoring tools?
It can be adapted to reference LIMS sample IDs, eQMS deviation records, and cryostorage monitoring alerts. The template is especially useful when you need a paper or digital SOP that ties those systems together through one controlled workflow. Add system-specific fields where the procedure records inventory movement, alarm review, or approval status.
How is this different from an ad-hoc inventory checklist?
An ad-hoc checklist usually records what was seen, but it does not define who verifies authorization, how discrepancies are escalated, or when material must be quarantined. This SOP template turns the task into a controlled process with clear roles, decision points, and documented closure. That makes it more suitable for regulated biologics work and audit-ready recordkeeping.
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