Planners Terminology

Bar Horizontal area on the spread sheet   and bar chart containing information about a task
Bar chart The area of the screen where tasks   can be viewed graphically.
Baseline A complete copy of the project schedule  recorded at a stage in time.  This is   useful in showing tasks commencing earlier or later than programmed.
Buffer A task that is use to collect float and protect the critical path through the project.  It achieves this by having its duration   dynamic which increases or decreases in response to project changes.
Constraint This is a software function to   inforce when a task can happen.    Constraint flags within the project software can have a major affect   on the ciritical path.
Construction programme This is a schedule of the actual   construction work and demonstrates the sequence how the building is assembled.
Construction Schedule Same as programme and program. A   graphical illustration of the sequence of construction works.  The Americans tend to use this phase more   than other countries in the world.
Critical path This is the longest sequenced route   of the project schedule.  Any changes to the route will affect the end date.
Date zero This is the point at which the physical   construction work commences and is usually counted in weeks from this   point.  E.g. week 1, week 2 etc.
Exceptions These are time periods that are   different to the usual working week. E.g. Holidays, overtime etc.
Float This appears on items that are not   on the critical path.  Float is the   amount of time a task may be delayed or extended before the item rejoins the   critical path and pushes out the end date of the project.  See total float and free float for more   information.
Free float This is one of the two types of   float; free float means that if the task is extended of delayed in anyway   during its period of float only this item is affected, nothing else will   move.
Lag (links) Waiting time that is shown as the   horizontal part on a link (e.g. concrete curing time, paiting drying time or   just delivery times)
Lead times This is the amount of time required to   manufacture, procure, purchase elements of the building e.g. Joinery.  Also, a period of time for other aspects   such as workshop drawings, sample approvals, drawing approvals and sign offs.
Link A line drawn on bath bar and   critical path programmes joining the next activity following from the   completion of a proceeding task.  e.g.   decorations will be linked to carpet.  If shown in red   then the link is critical.
Long Leads Elements of the construction that   requires a period of time for manufacture away from site.  For example, joinery, air conditioning   plant.
Plan The basic idea of how the   construction process will happen. 
Pre-construction An allowance of time for the  pre-construction tasks.  e.g. sub-contractor appointments,   mobilization, surveys, validations, site set up etc.
Pre-Construction The tasks and obligations needed for   the construction works to commence.    This can be administration,    enabling works, surveys etc.
Program The American spelling of programme.
Programme A graphical illustration of the   sequence of the construction process.
Progress Progress in the method used to mark   up the project so it is easy to know whether the project is in front or   behind.   A progress period is the reporting date,   shown as a line going down the screen, and it will bend to the left to show   items behind time and bend to the right to show items ahead of time.
Sub Contractor Procurement The process in tendering and   employing/hiring a company/organisation to undertake the part of the   works.  Usually a company that can   undertake a particular task e.g. roofing, decorations etc.
Summary This is an item that groups together   tasks on screen under its own task.    Items are grouped because they are they share certain information, for   example, summaries could be used to group together all the tasks on different   floors.  A summary could also be used   to show different phases or even stages within a project.  Summaries can be placed inside of each   other allowing a project structure of hierarchy to be created (Three   different buildings, broken up into 4 different floors – so 3 main summaries   each containing 4 more summaries inside of them)
Task An activity of work that contributes   to the whole project.  These are   illustrated as ‘blocks’ with a bar on the bar chart.
Total float This is one of the two typos of float.  Total float means that if the task is   extended or delayed in anyway during its period of float, then all items   directly after it (those containing float) will also be affected as   well.