CH 15: Understanding Software (CIS 2200)

Software

Computer program or collection of programs

operating system

Software that controls the computer hardware and establishes standards for developing and executing applications.
• Examples of OS

Application software

a type of computer program designed to help end-users perform specific tasks, such as productivity, entertainment, or business operations

firmware

It is software for hardware

Application examples

Micxrosoft office, Oracle, EA Sports, Etc.

Operating system examples

Microsoft Windows, Linux, Mac OSX

What’s the software source for Horizontal Applications?

Off the shelf

What’s the software source for Vertical Applications?

Off the shelf and customized

What’s the software source for One of a Kind Applications?

Custom developed

Horizontal Apllications

Software that can be used across alll industries

Vertical Applications

Software that is specific to a certain industry, instead of broader general use. Ex: Brightspace, POS Systems

One of a kind application

Specialized software that is tailored specifically to meet a unique need or niche purpose that standard, off-the-shelf software cannot satisfy.

Open Source Software

computer software with source code that is openly available for anyone to view, modify, and redistribute.

Why Do Programmers Volunteer Their Services to Open Source Projects?

to accelerate career growth, enhance skills, and build professional reputation

What are the 2 types of operating systems?

Mobile Operating systems (Phones) and Nonmobile Operating Systems (Windows, Linux, etc)

software developmental methodologies

Methods to divide tasks related to software creation and deployment up into tasks targeted at building better products with stronger product management guidelines and
techniques.

Systems development life cycle (SDLC)

the overall process for developing information systems, from planning and analysis through implementation and maintenance.

waterfall method

Relatively linear sequential approach to software development. Benefits include surfacing requirements up front and creating a blueprint to follow throughout a project.

What can the waterfall method prevent?

Feature creep: Expansion of the scope of a project.

Pros and Cons of the Waterfall Method

• Helps provide strong documentation that can be helpful in future maintenance of the product.

• Very rigid, can take a long time to implement, and requires precise forethought on all requirements needed at the end of the project.

scrum

Approach to organizing and managing agile projects that breaks deliverables into “sprints” delivered in one to six week increments by teams of less than ten.

What are the 2 types of participants in Scrum?

• core team members who are committed to the project, such as scrum master, product owner, development team

• people who are involved but not committed to the project, such as stakeholders,
  customers and executive management

Agile Development

Developing work continually and iteratively, with a goal of more frequent product rollouts and constant improvement across smaller components of the larger project.

Server Farm

Providing data services to custormors from far off distances

Why has agile development a dominant software development?

B/c it’s fast and flexible

Waterfall SDLC Process

• Define System: Begins with the business problem (or opportunity) followed by the feasibility analysis

• Technical, Cost, and Organizational feasibility

• Requirements identification: Gather and Prioritize the requirements

• Design: what technologies should be used, who are the stakeholders impacted

• Implement System: develop the system

• Verification: installation, testing, debugging

• Maintenance: performing changes, corrections, additions, and upgrades to
  ensure the system continues to meet its business goals