A generic sustainability assessment platform

Sustainability logbooks or ratings are often established for a project or programme involving infrastructure or other types of built assets where:

  • a logbook uses Logbook Documentation to establish reference frameworks, performance targets, indicators and evaluation methods for a limited number of predefined sustainability issues and objectives, ;
  • a rating uses Rating Documentation to specify requirements, performance levels, performance measures, and evaluation methods for a full set of predefined criteria covering a full range of sustainability issues and objectives.

In terms of their organisation and structure, the two approaches are identical. The main difference between a logbook and a rating is that stakeholders select a limited number of issues and objectives for a logbook whereas for a rating, the rating system expects all its criteria to be considered., the world's first generic, integrated, sustainability assessment users' platform that is now open for testing is designed to handle logbooks, ratings and integrated versions of the two systems for organising sustainability undertakings. The FIDIC-EFCA Project/Programme Sustainability Logbook (PPSL) system approach, see, is used in both cases.

For a logbook, issues and objectives are prioritised in a SUMMARY at a pre-operational phase such as feasibility, and outcomes during operational phases (Planning, Design, etc) are judged according to the SUMMARY. Similarly, for a rating, criteria scores established for the SUMMARY are compared during each operational phase.

This generic approach for handling logbooks and ratings requires a suitable terminology to define each of the components of a logbook or rating. The following terminology has been adopted for the PPSP:

  • Requirements
    Logbook: Description and general documentation
    Rating: Requirements
  • Assessment
    Logbook: Reference Framework
    Rating: Performance Level
  • Performance
    Logbook: Performance Target
    Rating: Performance Measure
  • Evaluation and Target Score
    Logbook: Evaluation Method and Target Score
    Rating: Indicator


The PPSP platform uses Subscriptions to organise documentation. PPSP Subscriptions define:

  • the number of Assets for which a logbook or a rating can be set up;
  • the Documentation that will be used for selecting entries in the Requirement, Assessment, Performance and Evaluation and Target Score categories.
The Documentation is as follows:

  • Trial Subscription: PPSL Documentation (international and Europe only) without links to relevant documents;
  • Full PSL Subscription: Full PPSL Documentation (international, Europe and national if available) with links to relevant documents;
  • Full Rating Subscription: Rating Documentation supplied by the user for uploading into the platform with Full PSL Documentation available (Separate and/or Integrated, see below)


1 - Registration

Users register and can start immediately to set up a PPSL logbook for each of five projects or programmes  by subscribing to a Trial Subscription. Users are sent details of Full Subscriptions.

A Trial Subscription uses the international and European entries of the Full PPSL Documentation without links to source documents. The Full PPSL Documentation may include national entries if they are available as well as updated links to source documents. 

To start setting up a logbook or rating,  an Asset is added on the Assets page and the required Documentation is then selected. PPSL Documentation (Trial with or without Full depending on whether a Full Subscription has been organised) is available by default. If Rating Documentation has been provided for a Full Subscription, one of two prearranged options will appear:

  • Separate Rating Documentation: the Rating Documentation is kept separate from the Full PPSL Documentation so the user can set up either a PPSL logbook or a rating using the supplied Rating Documentation;
  • Integrated Rating Documentation: the Rating Documentation is integrated with the Full PPSL Docmentation when the supplied Rating Documentation is entered into the platform. The user can then set up:
    • a PPSL logbook that integrates choices from the Rating Documentation;
    • a rating that integrates choices from the PPSL Documentation;
The first option is perhaps the more useful because it allows several rating systems to be managed at the same time (the rating criteria are entered into appropriate PPSL categories). It is planned to facilitate this option by allowing scores to be kept for each rating.


A Subscription's Logbook or Rating Documentation is used to complete, in a series of steps, the Requirements, Assessment, Performance, and Evaluation and Target Score categories for sustainability Issues and Objectives (logbook) or Criteria (rating), organised according to the sustainability Dimension and Theme. 

At Step 3 (Performance) in the data completion process for the SUMMARY, Evaluation Methods and Target Scores are added by clicking a link.

The SUMMARY is 'frozen' at Step 4 (Confirm) as the basis for evaluation during the operational phases.

Theme scores can be displayed. Plots will be extended to include Theme scores at each project or programme phase so that comparisons can be made between the outcomes at each phase with what was decided at the start for the logbook or rating SUMMARY.


Once the SUMMARY has been confirmed a menu icon appears allowing the Operational Response (Performance Measure, Evaluation Method and Target Score) for each project or programme phase to be completed. 

Further Information

For further information, please consult the PPSL site - - which gives full details about the FIDIC-EFCA Project/Programme Sustainability Logbook systems and its associated users' platforms:
  • Project/Programme Sustainability Logbook users' platform -
  • Project/Programme Sustainability Platform integrated users' platform -