Question

Q1) What are the factors that influences the decision of the design acquisition strategy for new system?

Q2) Describe the types of security requirements and how they may influence architecture design?

Q3)

Compare between logical and physical data flow diagrams based on the following criteria:

• What the model represents
• Main processes involved
• Stores main data
• Type of data stores
• System controls
  
  

Criteria	Logical	Physical
What the model represents
Main processes involved
Stores main data
Type of data stores
System controls

Answer 1

1) The factors affecting design acquisition are:-

1. Multiple owners and stakeholders to manage
2. Evolving user needs and requirements understanding – high volatility
3.   Large-scale or unprecedented development and integration
4. Interim operational deliveries
5. External technology impact and emergent behavior
6.   Explicit high-assurance focus

2)  

• The first and foremost responsibility of the operations group is security. Security is a major problem in today's internet world.
• The staffs are responsible for installing security-related control such as firewalls, intrusion detection systems, and other security-related controls.
• Security requirements are developed by assessing the value of the system and its data.
• Security requirements focus mainly on the users who can access the data, encryption of data, the application needs to be protected from viruses and authentication of data.

Influence of performance requirement in architecture design

• The resources can be handled by particular personnel only. It determines the authorization of that person to access the resources.
• The students who registered on the website can reserve the class and lessons.
• A particular student can view his/her profile only. apart from their profile other data should be protected.

3)

Design Feature	Logical	Physical
What the model depicts	How the business operates.	How the system will be implemented (or how the current system operates).
What the processes represent	Business activities.	Programs, program modules, and manual procedures.
What the data stores represent	Collections of data regardless of how the data are stored.	Physical files and databases, manual files.
Type of data stores	Show data stores representing permanent data collections.	Master files, transition files. Any processes that operate at two different times must be connected by a data store.
System controls	Show business controls.	Show controls for validating input data, for obtaining a record (record found status), for ensuring successful completion of a process, and for system security (example: journal records).