answered already passed
what is the purpose of the system analysis phase - correct answer ✔✔to figure out the business
needs
what is the purpose of the system design phase - correct answer ✔✔to decide how to build a
system that can fulfill those needs
system analyst role in system design - correct answer ✔✔most knowledgeable about the
business requirements
database specialists role in system design - correct answer ✔✔advise on database technology
network specialists role in system design - correct answer ✔✔advise on network technology
applications programmers role in system design - correct answer ✔✔experts in new and
existing applications development tools and standards
what is the deliverable for system design - correct answer ✔✔recommended solution new
system
what is the system design phase composed of - correct answer ✔✔logical system design and
physical system design
what does the logical system design include - correct answer ✔✔the proposed system and the
synchronized data and process models
,what does the physical system design include - correct answer ✔✔the candidate system
solutions matrix, the feasibility analysis matrix, physical dataflow diagrams, and input and
output designs
synchronizing of system models - correct answer ✔✔network, data, interface, and process
models represent different views of the same system, but these views are interrelated
why do systems analysts need to synchronize different views - correct answer ✔✔to ensure
consistency and completeness of the total system specification
data and process model synchronization - correct answer ✔✔- there should be one data store in
the process models for each entity in the data model
- there should be sufficient processes in the process model to maintain the data in the data
model
Data-to-Process-CRUD-Matrix - correct answer ✔✔rows: indicate entities and their attributes as
they appear in the proposed system ERD
columns: indicate elementary processes as they appear in the proposed system DFDs
cells: document level of access where CRUD (create, read/use, update/modify,
delete/deactivate)
why does every entity should have at least one C, R, U, D entry for system completeness -
correct answer ✔✔otherwise one or more event processes were probably omitted from the
process models
the candidate system solutions matrix/table - correct answer ✔✔defines the candidate
solutions that can provide the possible matches between business requirements and
hardware/software specifications (provides a comparison and contrast of the characteristics of
the candidate solutions)
, what are alternative solutions to the candidate solutions - correct answer ✔✔- do nothing:
leave the current system unchanged (not an option in this course)
- reengineer all the business processes and the computer-based processes
- enhance existing computer processes
what are alternative solutions are defined in terms of - correct answer ✔✔input/output
methods, data storage methods, computer hardware and software requirements, and people
implications
candidate solutions - correct answer ✔✔- determine which processes will be implemented as a
computer process or manual process
- based on response time requirements, establish which process is a batch process or online
process
- determine the alternatives for information system design (centralized or distributed
computing)
- consider the make versus buy (COTS) alternatives for application programs
- if software programs are to be developed, which technology will be used (Java, visual basics,
etc.)
- determine type of data storage technology will be used (electronic vs. non-electronic
- consider the applicability of the various networking technologies (LAN, WAN) and their
implications in information system design
the feasibility analysis matrix - correct answer ✔✔- compares and contrasts the effectiveness of
each candidate regarding each feasibility dimension
- the weights of the feasibility dimensions which have to be justified
- establish the weighting to be given to each the feasibility criteria
- each row can be assigned a score for each criteria
- a final ranking of weighted average is recorded in the last row