What are the steps to write an imaging specification or scanning SOP for a digitization vendor?

An imaging specification (or scanning standard operating procedure) is the contract-level document that tells a digitization vendor exactly what to produce, how to produce it, and how you will verify the result. A clear spec is what separates a defensible digital record from an unusable image. Build it in the following steps.

1. Define scope and the records involved

Identify the record series being scanned, their formats and physical condition, approximate volume, and the retention and legal status of each. Note any records that are permanent, contain personally identifiable information, or are subject to litigation hold, since these may carry stricter handling and quality requirements.

2. Set technical capture requirements

State the measurable image parameters the vendor must meet, such as:

• Resolution and color appropriate to the material (text versus photographs or maps).
• File formats for both the preservation master and any access or working copies.
• Compression rules, including where lossless capture is required.
• Color and tonal accuracy, using recognized targets and aim values rather than subjective judgment.

The Federal Agencies Digital Guidelines Initiative (FADGI) publishes widely used technical guidelines you can cite directly so requirements are objective and testable.

3. Specify metadata and file naming

Define the descriptive, administrative, and technical metadata to be captured, the naming convention for files, and how images map back to their source documents, folders, and boxes. Consistent linkage preserves the record’s context and findability.

4. Establish handling, security, and chain of custody

Describe how originals are transported, tracked, stored, and returned, and how digital files are secured in transit and at rest. For sensitive or regulated content, state confidentiality, access, and breach-notification expectations.

5. Define quality control and acceptance

Specify inspection methods, sampling rates, defect tolerances, and the process for rejecting and re-scanning failed batches. Make acceptance criteria pass or fail and tied to the technical requirements above.

6. Address disposition of originals and recordkeeping

State whether originals are retained, returned, or destroyed, and document the trusted-system and validation steps that support relying on the digital copy. Keep the spec, QC logs, and exception reports as evidence of a sound process.

Treat the specification as a living document, reviewed as standards and needs change. For related guidance, see the digitization and imaging topic hub.