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<DIV dir=ltr align=left>
<DIV> </DIV>
<DIV>In Project Management Lead Time is the time it takes to complete a task or
a set of interdependent tasks. The Lead Time of the entire project would be the
overall duration of the critical path for the project.</DIV></DIV>
<DIV dir=ltr align=left> </DIV>
<DIV dir=ltr align=left><A
href="http://en.wikipedia.org/wiki/Lead_time#Lead_time_in_Project_Management">http://en.wikipedia.org/wiki/Lead_time#Lead_time_in_Project_Management</A></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>The time required by one task before another task can begin. </DIV>
<DIV>
<P><FONT color=#0000ff>Baker, S & K. Baker. On Time/On Budget, Prentice
Hall, Englewood Cliffs, NJ, 1992</FONT></P>
<P><BR>An overlap between tasks that have a dependency. </P>
<P><FONT color=#0000ff>Glossary, User's Guide for Microsoft Project 98,
Microsoft Corporation, 1997, p307</FONT></P></DIV>
<DIV><BR>A technique called <STRONG><EM>lead time</EM></STRONG> is used to
represent partial dependencies. By using lead time, certain tasks can overlap by
a fixed amount or by a percentage of the predecessor task. For example, testing
can start when 30% of coding is finished. It can be thought of as the
predecessor task getting a head start, or lead, before the successor task
starts. Because the term is easy to confuse with Lag Time, lead time is also
referred to as Overlap or Negative Lag. </DIV>
<DIV> </DIV>
<DIV><A
href="http://www.leadingproject.com/wiki/Glossary/LeadTime">http://www.leadingproject.com/wiki/Glossary/LeadTime</A></DIV>
<DIV> </DIV>
<DIV>
<P align=left>Occurs when a task should theoretically wait for its predecessor
to finish, but can actually start a little early. The time that the tasks
overlap is lead time. For example, when replacing computers in a computer lab,
you could actually start bringing in the new computers while the old ones were
being packed up and moved out. The time during which packing and unpacking can
happen at the same time is <EM>lead time</EM>. </P></DIV>
<DIV><SPAN class=019401902-05032009><FONT color=#0000ff>Gospel according to
</FONT><A
href="http://www.mckinnonsc.vic.edu.au/vceit/ganttpert/projmanterms.htm"><FONT
color=#0000ff>Mark</FONT></A><FONT
color=#0000ff> (Kelly)</FONT></SPAN></DIV>
<DIV><SPAN class=019401902-05032009></SPAN> </DIV>
<DIV><SPAN class=019401902-05032009></SPAN> </DIV>
<DIV><SPAN class=019401902-05032009>Seems to me that the partial dependency
theory definition wins the day for Lead time.</SPAN></DIV>
<DIV><SPAN class=019401902-05032009></SPAN> </DIV>
<DIV><SPAN class=019401902-05032009>Slack and Lag time would seem to be
interchangeable for the purposes of Units 3 and 4 ITA.</SPAN></DIV>
<DIV><SPAN class=019401902-05032009></SPAN> </DIV>
<DIV>M<SPAN class=019401902-05032009>ark Scott</SPAN></DIV>
<DIV><SPAN class=019401902-05032009>Luther College</SPAN></DIV>
<DIV> </DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> itapps-bounces@edulists.com.au
[mailto:itapps-bounces@edulists.com.au] <B>On Behalf Of </B>PARAGREEN,
Chris<BR><B>Sent:</B> Thursday, 5 March 2009 12:37 PM<BR><B>To:</B> Year 12 IT
Applications Teachers' Mailing List<BR><B>Subject:</B> RE: [Year 12 IT Apps]
information needed for gantt charts<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">My
first post as a newbie IT teacher!<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">“Just”
a question about some of the definitions for Gantt
charts….<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">According
to Potts (p30), lead time is, “… time leading up to or before a task.” It
further explains the concept, but essentially this is it.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">My
understanding is that lead time is the time available to begin a dependant task
before its predecessor is finished.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">For
example, you can’t set up a computer until the box has arrived, but you can
prepare the room in advance.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Similarly,
Potts states that slack time and lag time are the same thing, whereas I think
they are not.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Slack
is the available time to allow for delays, but lag is the time between when a
task finishes and when it’s dependant task can begin.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">For
example, if pouring concrete, the actually pouring task might have finished, but
you have to wait for the concrete to cure (the lag time) before you can paint
it.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Are
my definitions too precise for what we need to teach, am I wrong, or am I
missing something?<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Regards,<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10.5pt; COLOR: teal; FONT-FAMILY: 'Comic Sans MS'">Chris
Paragreen<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #400080; FONT-FAMILY: 'Comic Sans MS'">IT,
Mathematics and Japanese Teacher and Timetabler</SPAN><SPAN
style="COLOR: black"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #400080; FONT-FAMILY: 'Comic Sans MS'">Kew High
School<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #400080; FONT-FAMILY: 'Comic Sans MS'">1393 Burke
Road<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #400080; FONT-FAMILY: 'Comic Sans MS'">Kew East
VIC 3102</SPAN><SPAN style="COLOR: black"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #400080; FONT-FAMILY: 'Comic Sans MS'">phone +613
9859 8652 fax +613 9819 7880<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><A
href="mailto:chris.paragreen@kew.vic.edu.au"><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Comic Sans MS'">chris.paragreen@kew.vic.edu.au</SPAN></A></SPAN><SPAN
style="FONT-SIZE: 10pt; COLOR: #400080; FONT-FAMILY: 'Comic Sans MS'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 14pt; COLOR: #0033cc; FONT-FAMILY: 'Franklin Gothic Demi Cond','sans-serif'">2008
International Year of Languages </SPAN></B><SPAN
style="FONT-SIZE: 14pt; COLOR: #0033cc; FONT-FAMILY: 'Franklin Gothic Demi Cond','sans-serif'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 14pt; COLOR: red; FONT-FAMILY: 'Franklin Gothic Demi Cond','sans-serif'">Languages
Still Matter! <o:p></o:p></SPAN></B></P>
<DIV>
<P
class=MsoNormal><o:p> </o:p></P></DIV></DIV>_______________________________________________
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