Point-in-time requirement tracking methods and apparatus

An apparatus comprising:

• a project management server configured to:
• store requirements for a building construction or remodel project in a database, the stored requirements corresponding to a first version of a technical specification document and including:
• at least a first requirement stored in a first record,
• a first image associated with the first record, and
• a first linkage between the first requirement and pixel locations of the first image,
• wherein each requirement specifies a physical description or a value related to the construction or remodel of a building and the first record includes a requirement identifier and a date-stamp of when the first record was created;
• receive, from a first client device, a change to the first requirement made during an edit session that corresponds to a second version of the technical specification document;
• store, in the database, the changed first requirement to a second record, the second record including a requirement identifier and a date-stamp of when the second record was created;
• store, in the database, a second image associated with the second record and a second linkage between the first requirement and pixel locations of the second image;
• cause the first and second records to be displayed, by the first client device, in association with each other such that the changed first requirement is displayed as a most recent version of the first requirement;
• receive a request to view a requirement history from the first client device or a second client device;
• and
• provide, in a user interface, information from the first and second records to the first client device or the second client device so that the user interface displays the first requirement as specified in the first record in association with a date the first record was created and the first requirement as specified in the second record in association with a date the second record was created to show how the first requirement has changed during the building construction or remodel project,
• wherein the project management server is configured to cause the information from the first and second records to be displayed in the user interface concurrently in relation to the date-stamps of the first and second records such that the information from the first and second records can be compared, and
• wherein the project management server is configured to display the first and second images in the user interface as progression images of the first requirement.