What is ISO/TS 15311‑1 about?  
ISO/TS 15311‑1 defines print quality metrics, measurement methods, and reporting requirements for printed sheets that are suitable for all classes of printed products.
Guidance as to which of these metrics to apply to any given product category along with acceptable conformance criteria is provided in subsequent parts of ISO/TS 15311.
Although ISO/TS 15311‑1 is expected to be used primarily to measure prints from digital printing systems, the metrics are general and can be applied to other kinds of print.
Who is ISO/TS 15311‑1  for? 
ISO/TS 15311‑1 on measurement methods and reporting schema are useful for:  
- Quality assessors of printed sheets
- Reporting manager of printed sheets
- Printed products manufacturers
Why should you use ISO/TS 15311‑1?  
 When producing a colour reproduction, it is important that the persons responsible for data creation, colour separation, proofing and printing operations have previously agreed a minimum set of parameters that define the visual characteristics and other technical properties of the planned print product. ISO/TS 15311‑1 identifies a number of metrics that can be applied to printed sheets and that can be used as the basis for such communication. The range of metrics is large, and it is not intended that all of these metrics are to be applied to any given printed product and for any given application.
The range of metrics is to be carefully selected, for example, based on subsequent parts of ISO/TS 15311.
The metrics described by ISO/TS 15311‑1 can be applied to any type of print. They are likely most often to be applied to digitally printed prints.
When selecting the set of metrics, only those metrics that have a clear specification and that correlate well with human perception are included in ISO/TS 15311‑1. Since this is an area of significant research activity, new metrics are expected to emerge and existing metrics to be revised in the next few years. For this reason, we anticipate the need to revise ISO/TS 15311‑1 within a very short time scale as new metrics are tested and found to be reliable. 
What’s changed since the last update? 
PD ISO/TS 15311‑1:2020 supersedes PD ISO/TS 15311‑1:2019, which
is withdrawn. The main changes compared to the previous edition are as follows:
- Computing and analysing colour gamut
- Contouring
- Perceived resolution
- Macroscopic uniformity
- Indoor light stability (home and office display) has been modified
