Hardware Reference
In-Depth Information
Resource cost is used with the cumulative time weight in calculating effort of a particu-
lar measure. It is calculated by adding the cost of different resources involved in it.
௜ୀଵ (3)
In these calculations, we assumed that the working hours in a month depend on the
organizational work policy. Currently we assumed that resources work 8 hours daily
and 22 days per month means they work total 176 hours per month.
ܴ݁ݏ݋ݑݎܿ݁ܥ݋ݏݐሺܴܥሻൌσ ܫܴܥ݅
Factor 3: Value . Value is defined as a measure's dependency to other measures (di-
rect and derived measures [26]) and its importance in a client organization's view as
its Dependency and its Importance. This dependency identification is critical for ef-
fectiveness of final decision making. In OMSD, we used only direct measures in order
to make decision process easier. If a derived measure came up we adjust it by calcu-
lating the cost of each base measure and then add them together. For example, cost of
'Development effort' measure is calculated by adding cost of measuring 'number of
persons' and 'number of hours'. By means of that, we avoided complexity of depend-
ency between measures. On the other hand, Importance of a measure (it is related to
the priority of the goals identified) depicts the significance of a particular measure in
the view of customer. We have defined four levels of importance which includes
Level 1: Minor, Level 2: Essential, Level 3: Major, Level 4: Critical.
Factor 4: Type . The type of a measure is collected for information purposes only.
The type is defined as associated attributes and Category.
Factor 5: Repetition . Data on this factor is also collected only for information
purposes. It facilitates in decision making later on by identifying the multiple us-
age/repetition of the same measure. In this way, it reduces the probability of redun-
dancy.
Decision Factors: Decision factors include the effort required to collect a particular
measure.
Effort is calculated in terms of person-hours through cumulative collection time
weight and resource cost as;
ܧ݂݂݋ݎݐൌܥܥܹܶൈܴܥ (4)
Then, the effort is used to calculate the cumulative cost (CC) for collecting a particu-
lar measure. And it is calculated by the following formula; (see also Factor 2: Cost).
ܥܥൌܧ݂݂݋ݎݐ൅ܧݔ݌݁݊ݏ݁ (5)
2.5 Decision Making
Decision making is the final step in the OMSD model. Decision making is a process
that shows expertise of an individual in selecting one solution out of the possible
alternatives [27]. There are different categories given in the literature [27] that differ-
entiate different decision making problems.
Decision making in OMSD model includes controlled inputs in the form of con-
straints (time and cost limits) and variables as factors such as usage and importance.
This cost limit is used as Constraint cost (Ccost) while executing 7 steps of the
screening process (explained below). So, the problem addressed by OMSD model is
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