How to Set Up a Trial Master File
Build the TMF that proves a trial was conducted and the data are credible.
What a how-to is not
A how-to is SPEQ’s practitioner method, not a procedure. It does not replace your own SOP, it is not a validated approach, and the judgement calls in it belong to your quality unit.
The Trial Master File (TMF) is the collection of essential documents that individually and collectively permit the conduct of a clinical trial to be evaluated and the quality of the data to be verified. Setting it up well — complete, contemporaneous, and inspection-ready — is how a sponsor and site demonstrate GCP compliance.
- 1
Define the TMF structure and index
Define the structure and index before the first document exists, aligned to a recognised reference model and to how the trial will actually run. A structure invented as documents arrive produces a file that only its creator can navigate, and navigability is the point — the file has to let someone who was not there reconstruct the conduct of the study.
- 2
Assign responsibilities
Assign responsibility for each section and each document type to a named role, including the documents held by vendors and by sites. The sections that fail are the ones everybody assumed somebody else owned, and vendor-held documents are the classic case: contracted, produced, and never transferred into the file.
- 3
File contemporaneously
File contemporaneously, as documents are produced rather than at milestones. A file assembled before an inspection announces when it was assembled, through its metadata and through the uniformity of its gaps, and an inspector reads that as a statement about oversight rather than about filing.
- 4
Control quality and completeness
Run quality control on completeness and quality against the index, on a defined cadence, and act on what it finds. The useful measure is not how many documents are present but whether the expected documents for the trial’s current stage are present — a completeness check against what has been filed can only ever confirm itself.
- 5
Ensure inspection readiness and archiving
Keep the file inspection-ready throughout, and plan the archive from the start: retention period, format, readability over that period, and who holds it. Electronic files carry the additional obligation that records remain accessible and readable for the full retention period, which is a decision about formats and custody rather than about storage.
- !Reconstructing the TMF near database lock or before an inspection, breaking contemporaneity.
- !No clear ownership, so documents fall between sponsor and site.
- !Gaps discovered only at inspection because completeness was never reviewed.
- !An electronic TMF without adequate access control, audit trail, or validation.
How to Set Up a Trial Master File: frequently asked questions
Common questions on set up a trial master file.
What is a Trial Master File?
The TMF is the collection of essential documents that allow the conduct of a clinical trial and the integrity of its data to be evaluated. It demonstrates that the sponsor, investigator, and monitor complied with GCP and applicable regulatory requirements.
Why must the TMF be contemporaneous?
Because it is the evidence the trial was conducted properly as it happened. A TMF reconstructed at the end cannot reliably show that documents existed and decisions were made when they should have been — and "TMF completeness and timeliness" is a common inspection focus.
What is the difference between the TMF and the ISF?
The Trial Master File is held by the sponsor; the Investigator Site File (ISF) is the site’s portion of essential documents. Together they form the complete essential-documents record; both must be maintained and inspection-ready.