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business requirements and needs for the system (a process known as
data modeling). The bank employees (e.g., bank tellers) would
explain to the EDS personnel the types of functionality (i.e.,
information) that they needed to access in using the SBS system.
Additionally, business analysts at Norwest examined the various
functionality requirements of the bank employees and drafted design
documents indicating the recommended design approaches or changes.
After EDS completed the initial design and development phases,
Norwest was used as the test bed for SBS. A large database of
sample test data was created, and as early design releases arrived
from EDS, Norwest ran SBS in its computer environment to test the
software. These tests were conducted on multiple days of
transactions to observe the performance of the system over a
specific time span. After a test run, the results were analyzed,
EDS employees were debriefed, and suggested changes to the design
were made. These testing and redesigning phases continued for
approximately 3 years in the case of the customer module and for
approximately 4-1/2 years in the case of the deposit module.
Norwest discovered hundreds of problems in the modules it
received from EDS. One problem that arose in the development of
the customer module was its interface link to the deposit and loan
application systems already in place at Norwest during that time,
which was necessary until the new SBS deposit and credit modules
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