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plan.txt
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1994-11-03
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Psion 3a
Plan
User Guide
Copyright A. Clarkson 1994
INTRODUCTION
Plan is a project planning application for the Psion 3a. Plan
allows a project plan to be constructed from individual task
components. Task and resource details are entered into the
application along with dependencies between tasks. The application
will then calculate the schedule for each task and the project as a
whole.
Each task has the following key values:
- start date and time,
- work,
- resource work rate,
- end date and time.
Usually only two or three of the above values are entered, with the
other values being calculated by Plan. For example:
- A start date and time may be entered along with an amount of
work and work rate, from which the end date and time are
calculated.
- Given a start and end date and time, and a rate, Plan will
calculate the work. This could be used where a task has been
completed, the start and end are known along with the average
work rate but the exact amount of work needs to be calculated.
- Given a start and end date and time and work, Plan will
calculate the work rate. An example of a case where this could
be used is where it is required to calculate the number of
people who will need to work on a given task in order to
complete it on a given date.
A resource may be assigned to a task at a given work rate. The
resources work hours, holiday information and work rate are then
taken into consideration when calculating when the task will end or
the work required for a task.
Consider a task which is estimated to take two man days to
complete. One man day being the time between the start and end of a
normal working day (set to 8.0 hours in this particular case). A
resource is assigned to the task where the resource has the
following features:
- A standard work day, starting at 9:00am, ending at 5:00pm
- Works a standard week starting on Monday and ending on Friday.
The task start day is set to a Monday at 9:00am and the work set to
two days. Plan calculates the end of the task to be 5:00pm on
Tuesday. Assume now that the resource is only available to work on
the task at a rate of 50% rather than 100%. Plan would now indicate
the end of the task to be Thursday at 5:00pm. Assume also that the
resource takes one day holiday on Tuesday. Plan would calculate the
end to be Friday at 5:00pm. Suppose that the task is completed and
actually finished at 5:00pm on Wednesday rather than 5:00pm on
Friday. Plan will allow the end time to be set to the actual end
time and will then calculate the work given the start, end and
resource details to be one man day rather than two.
Dependencies may be set between tasks so that the start of one task
depends upon the end of another. If the first task is delayed the
second will also be delayed. Dependencies may be set for a number
of reasons, such as:
- If one task cannot logically start until another task
finishes, for example in a software development project the
development may be dependent upon the requirements phase.
- Resource limitations may impose dependencies, for example if
two tasks need to be carried out by one person and the person
works on the tasks sequentially then a dependency can be used
between the tasks.
For a set of dependent tasks there will a number of the tasks which
are critical to the end of the project. If any one of these tasks
are late then the end of the project will be delayed. This set of
tasks are described as being on the critical path. It is important
to know the critical path for two reasons. Firstly it is useful in
identifying the tasks which it may be worth adding extra resource
to in order to bring the project in sooner. Secondly it is useful
in highlighting those tasks which will need to be monitored
carefully when the project is in progress in order for the end of
the project not to be delayed. For these reasons Plan has an
option which will calculate the critical path.
INSTALLATION
Copy the Plan application PLAN.OPA into a directory called \APP on
any drive and install from the system screen using the psion-i key.
Copy the PLAN1.OPO file into the same directory as the PLAN.OPA
file. Create a new directory called \APP\PLAN on any drive. Copy
any optional plan modules into this directory. The only currently
available plan module is MPX.OPO, further modules may become
available at a latter date. See the modules section for further
details on Plan modules. A typical installation might be:
M:\APP\PLAN.OPA
M:\APP\PLAN1.OPO
M:\APP\PLAN\MPX.OPO
The plan and resource files used by Plan should be kept in a top
level directory called \PLN on either the internal disk or an
external ram disk. An example project plan called EXAMPLE.PLN along
with a resource file called EXAMPLE.RES are provided which may
optionally be installed into the \PLN directory.
Plan requires either 45k or 58k of disk space for installation
depending upon whether the optional MPX module is installed. 40k of
run-time memory is required in order to open a new plan and
resource file.
This software is provided as is, without any warranty of any kind.
The author shall not be liable for any loss of data or damage
arising from the use of this software.
SHAREWARE REGISTRATION
Plan is shareware, which means that if you continue to use it you
should register with the author. The software may be freely
distributed provided all files in the package are included. A
maximum of 10 tasks may be entered until the program is registered
by entering a special code via the register menu option.
To register send a 10 UK pounds check to:
A. Clarkson,
3 Ashmead Drive,
Hardwick,
Cambs. CB3 7XT.
UK.
State the version of the program, which is 2.1.2, and where you
obtained the copy. This will ensure that everyone has access to the
latest version.
In return you will receive a password code which may be entered
into plan. This will remove the 10 task limit from Plan enabling up
to 99 task to be entered. You will also receive notification of new
versions of the software and you may have a say in how the software
is improved in the future. If you have an email address quote this
in order to receive the registration code via email more quickly.
KEY FEATURES
Plan has the following key features:
- A separate file for each project plan with either plan
specific or a shared resource file.
- Up to 99 tasks may be entered, each having the following
details:
Id,
description,
start date and time,
end date and time,
work,
resource,
rate of work,
work done,
costs,
user fl