Initially estimation is the primary point of concern between client
and service provider. It is the key to make project IN or OUT for service
provider. It is always tedious task to do perfect estimation and satisfy the
client. However, as a service provider we believe to make it as much as close
to client’s need and expectation. Here, we are going to discuss few points to
prepare estimation.
Firstly, if requirement is pretty much clear and everything is
defined in detail then proper and final estimation can be prepared. It is
easier to allocate hours for activity rather then big task. So, make work down
breakdown structure basis on requirement and split the task in to small amount
of activity as much as possible. One big task can be group of bunch of
activities and once it is divided and elucidated then it’s quite easier to
instill hours for it. Bottom-up estimation is the best technique to be followed
in this scenario.
Secondly, sometimes some points might be not clear from the
requirement or it can be new for us which we haven’t done before then in this
case we can find similar type of work if we have done in any previous project
and try to compare with it. Perhaps we get some idea to estimate proposed task
with the use of parametric estimation. Here, we can use parameters of previous
projects to find out placeholder for current requirement.
Thirdly, after did all hard work still you can’t do estimation for
any task owing to it’s new for you or you haven’t experience like it before
then you can go with three point estimation. Based on assumption, you can take
hours for optimistic and pessimistic and find out estimation from PERT
technique. You can add some contingency in this type of task because it is
totally risk for you as it is completely new task for you.
Finally, in some unknown or new type of work, it is preferable to
provide range of hours then fixed number of hours. If you provide any fixed
number then client always expect delivery on that particular timeline rather
provide range hence you can discuss with client in dates not in fixed number.
It will also helpful to build trust between client and you as you can provide
delivery on time and that can maintain effective relationship as well.
To conclude, estimation is very crucial to define first relationship
between client and service provider, so make it as much impressive and proper
as you can. Sometimes, due to improper estimation client reject the service
provider and hand over project to other one. Thus, try to catch attention of
client and grab the project with best estimation as per your experience and
techniques.