Transcript Project Management

WBS & GANTT chart
Project Management
(seminar)
Work Breakdown Structure
• Similar to the assembly (Gozinto) charts.
• A tool used to define and group a project's discrete work
elements (tasks) in a way that helps organize and define
the total work scope of the project.
• The project is divided into hierarchical groups of tasks
(work packages, and work units).
• Tasks, work packages and work units should be
budgetable (money, labor hours, and other resources).
• The technique of creating a WBS is non-uniform.
Example of a WBS
Possible levels in a WBS
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Project (or sub-project)
Deliverables
Sub-deliverables
Work packages
Work units
Assembly chart (Gozinto chart)
example
WBS example
Example of WBS: “Holiday”
holiday
travel
documents
passport
booking
tickets
insurance
choose
resort
household
confirm
brochures
Original slide is from the internet
cat!
What is the greatest difference
between a Gozinto and a WBS
chart?
WBS exercise
Plot a Gozinto and a WBS chart for the next project:
• Main task: prepare lunch with 2 dishes.
• The 1st course requires 2 main groups of ingredients
(A & B) that should be bought separately (time to buy
is 30 mins per ingredient-group). Cooking is 1 hr.
• The 2nd dish requires 3 group of ingredient (A, C &
D), procurement time is the same). Cooking needs 1.5
hrs.
• Cleaning after cooking needs 20 mins for 1 person, 10
mins for 2 people.
GANTT charts
• Named after Henry Gantt (1861 - 1919) an
American mathematical engineer.
• A Gantt chart is a type of bar chart that
illustrates a project schedule.
• Gantt charts illustrate the start and finish dates
of the work elements (tasks) of a project.
• Elements of a GANTT chart:
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Task names
Start and finish dates of each tasks (graphically)
Dependency relationships
Task duration
Lag relationships (start-to-start, finish-to-start etc.)
Name of the project worker responsible for the task or
other resource specifications
Benefits of the GANTT chart
• Easy to read and comprehend
• Easy to create
• Identify the project network coupled with
its schedule baseline
• Allow for updating and project control
• Useful for resource planning
Limitations
• can become quite unwieldy for projects
with too many activities
• projects are often too complex for a Gantt
chart
• Gantt charts represent only a part of the
project constraints
• The technique of creating a GANTT
depends on the features of the project.
GANTT chart example
ID
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Activities
Who
is
respo
nsible
?
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Time intervals
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GANTT chart example
Some Gantt charts also show the dependency
relationships between activities.
activities
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time
GANTT chart example
GANTT chart example
Gantt charts can be used to show current schedule
status using percent-complete shadings, or colour
lines and a vertical "TODAY" line.
Activities
time
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2.
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6.
today
GANTT exercise
• Given the WBS from the previous exercise
and the additional information that there are
two identical project workers (X and Z) who
can work simultaneously, plot a simple
GANTT chart with the following content:
– Task names
– Time schedule
(time units are 10 minutes long)
– Task durations
– Denominate the person in charge for every task
• Simultaneous work is possible.
GANTT exercise 2
• How long is the full project?
• Denote the precedence relationships in
the chart!
GANTT exercise 3
• Show the schedule status on the GANTT
chart for the same project after 80 minutes
if:
• All the A, B and C ingredients are bought,
but the purchase of ingredient D is only
67% complete.
• The 1st course is already half-cooked, but
the „operations” on the 2nd dish could not
started yet.
GANTT exercise 4
• Plot a new chart with the same data but with real
times within a day. The following information are
added:
• The market, where the ingredients should be
bought is open only from 8 a.m. to 10 a.m. and
the earliest is the better.
• The lunch preparations (including the cleaning)
should be ready exactly at noun (12 a.m.).
• Do not plot the schedule status.
Readings
• Lockyer – Gordon (2005) Chapter 4
Thanks for the attention!