Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Simulation Model for the Waterfall Software Development Life Cycle   Software development life cycle or SDLC for short is a methodology for
designing, building, and maintaining information and industrial systems. So
far, there exist many SDLC models, one of which is the Waterfall model which
comprises five phases to be completed sequentially in order to develop a
software solution. However, SDLC of software systems has always encountered
problems and limitations that resulted in significant budget overruns, late or
suspended deliveries, and dissatisfied clients. The major reason for these
deficiencies is that project directors are not wisely assigning the required
number of workers and resources on the various activities of the SDLC.
Consequently, some SDLC phases with insufficient resources may be delayed;
while, others with excess resources may be idled, leading to a bottleneck
between the arrival and delivery of projects and to a failure in delivering an
operational product on time and within budget. This paper proposes a simulation
model for the Waterfall development process using the Simphony.NET simulation
tool whose role is to assist project managers in determining how to achieve the
maximum productivity with the minimum number of expenses, workers, and hours.
It helps maximizing the utilization of development processes by keeping all
employees and resources busy all the time to keep pace with the arrival of
projects and to decrease waste and idle time. As future work, other SDLC models
such as spiral and incremental are to be simulated, giving project executives
the choice to use a diversity of software development methodologies.

4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th