Measurement and Metrics - Requirements Engineering and Management for Software Development Projects - page 139

This metric can be derived only after the project is completed. It is easy to derive
this metric because, we do not have to utilize special timesheets to extract effort data.
This metric is computed in most organizations and is utilized for estimating the
resource requirements for the requirements engineering activity of the project. It is
also utilized in cost estimation for the purposes of setting a budget for the project
in the case of internal projects and for setting the price in the case of external
projects to offer a quote against the RFP.

10.3.1.2 Productivity of Elicitation and Gathering

The formula for computing the productivity metric for elicitation and gathering is:

PEG ¼ EEG N

Where:
PEG Productivity for Elicitation and Gathering

EEG Effort spent in person hours for all requirements engineering activities

related to elicitation, and gathering

N Number of requirements as established in the requirements traceability

matrix or URS

Data for this metric can be collated from:

1. Project timesheets in which the effort spent would be available.
2. Number of requirements can be collated from the traceability matrix or URS.

This metric can be derived after the project requirements are established and are
subjected to configuration management. We need not wait till the project is
completed. It is not easy to derive this metric because, we do not get this data in
the usual timesheets used in the industry. We have to utilize special timesheets to
extract effort data.
Most organizations do not compute this metric because of the difficulty in
obtaining the effort data. If computed, it gives better insight into how each of the
major requirements engineering activities are consuming the total effort and
thereby allows us an opportunity to effect focused improvement.

10.3.1.3 Productivity of Establishing the Requirements

This metric is computed to arrive at the productivity for establishing the
requirements as URS and SRS. The activities, of documenting, verifying, vali-
dating, and implementing the feedback, are all included in the effort used for
computing the metric.
The formula for this metric is:

PER ¼ EPR N