Jing Jiang

Good explanation, Karabo
I agree with you that each method has its pros and cons, so choosing the approach should take many elements into consideration, such as business objective, system requirement and risk acceptance level of the company and etc.

Direct approach refers to changing over from the old system to a new one by turning off the old system when the new system is turned on. Direct installation may be simple and cheap, but it has the highest risk.

Parallel approach refers to running the old information system and the new one at the same time until management decides the old…[Read more]

Hi xiaomin,
You provide a good introduction on AWS and a good cloud security guidance. I agree that effective governance, strong authentication, physical environment, agreements are all important to ensure the cloud security. Adding your points that having the right to audit clause in the agreement will help the identification of the risks and…[Read more]

Thanks for sharing many cloud sharing providers and good AWS introduction. I would go with AWS as well because its broad services providing, high availability and cost-effective.

Good points. The open source applications may be looked like a cost-efficient option, but it may reduce the competitiveness of the company to some extent, and it may have other hidden costs such as installation, training, support, maintenance which should also take consider.

Mobility impairment is indeed limit person’s interaction with a system. You provide great examples used to accommodate this type of disabilities. Whether to taking accommodations in a system or not, should take the necessity (i.e. target users, numbers of disabilities in the workforce, price) into consideration.

You do a good job in introducing the autism and the software used to help the people with autism. I learned a new disability type. As the development of the technology, I believe more devices or products can be accessible to those people who with disabilities.

Thank you for sharing, Hanqing. You mention many useful programs such as speed synthesizers, the word prediction machine which can be used to help disabilities to have better study experience. I agree with you that Fox should have some devices that are designed to be disabilities- friendly. I also recommend that when learning about the design of…[Read more]

I agree with you. The design of a database is a complex work, the corporation between team members would be a better solution than doing by an individual. The design should match the requirements and should be feasible for the company to implement.

Hi, Lyana.

You provide clear points for how to evaluate the solution’s suitability. The consistency with the business requirement should be the most important consideration when evaluating the solution. System analysis is a good one to identify the improvements needed to better meet business needs.

Good point, Xinteng.

I agree with you that the stakeholders and senior management should be involved in a project. It is very important for their involvement to provide a direction and facilitate the process of a project.

Smart as you:)

Well said, Yijiang.
Using integrated diagrams is necessary when designing a system. It will help a reader better understand the main concepts, reduce potential inconsistency between diagrams and find potential deficiencies in time. I totally agree with you that finding errors earlier design phase is important to reduce perhaps financial losses…[Read more]

Thanks for the explanation. I learn the difference between UML diagrams more clearly. By cross-checking these different diagrams can ensure the consistency and better meet the design requirements.

Well said, Xinteng.

I agree with you that different people will have different thoughts based on the same scenario. You mentioned the important factors to build the class diagram including the proper relationships, correct logic, and attributions.

I agree with you. The class diagram may be different from person to person, but it is hard to say if the diagram is all correct or wrong. If they make sense for the purpose of the diagram and using proper syntax, I think it can be a good class diagram.

Hi Iyana,
You provide great points. Multiplicity is the important one in the class diagram which I didn’t recognize when I was thinking about the question. It is necessary for understanding the relationship between two classes.

When evaluating class diagrams, we look for the following objectives:
1. Less coupling. Coupling is a quantitative measure of how closely related classes are linked. Two classes are better to be loosely coupled, which means two classes without lots of tightly coupled associations and messages.
2. Cohesion is a quantitative measure of the focus…[Read more]

I like your points on why analyzing data is important and how it benefits the physical design. I have the same opinion as you that analyzing will deepen the understanding of the business which will be an important consideration in effectively designing a database.

Well said, Karabo.

The development of the system must address the business needs. No formal analysis of the data, no correct understanding of the business, and no effective design.