Change Concerns

ONE PARAGRAPH OVERVIEW

List of subtopics:

Management Concerns

ONE PARAGRAPH OVERVIEW

List of subtopics:

Accessibility

ONE PARAGRAPH OVERVIEW

Details:

Auditability

ONE PARAGRAPH OVERVIEW

Details:

Configurability

ONE PARAGRAPH OVERVIEW

Details:

Correctness

ONE PARAGRAPH OVERVIEW

Details:

Dependability

Taxonomy of Concerns

ID	Attribute	Concern
DE-01	Availability	Operational availability Readiness for usage. The degree to which a system, subsystem, or equipment is operable and in a committable state at the start of a mission, when the mission is called for at an unknown, i.e., a random, time. A measure of the planned up time during which the system is actually available for use and fully operational.
DE-02	Biocompatibility	The ability of a device to perform its intended function, with the desired degree of incorporation in or application to the (biological) host, without eliciting any undesirable local or systemic effects in that host.
DE-03	Privacy	Ensurance that information about a person is free from any intrusion not sanctioned by the person.
DE-04	Reliability	Continuity of service. The rate of failure in the system that renders the system unusable. The ability of the system to keep operating over time.
DE-05	Robustness	Graceful handling of invalid inputs. Ensurance that user input cannot crash the system or corrupt data, even if that user input is abnormal, unexpected, or malicious.
DE-06	Safety	Non-occurrence of catastrophic consequences on the environment
DE-07	Security	Ensurance that information is accessible only to those authorized to have access. A condition of not being threatened, especially physically, psychologically, emotionally, or financially.
	Integrity	Non-occurrence of improper alterations of information. Ensurance that data is "whole" or complete. The condition in which data is identically maintained during any operation, such as during transfer, storage or retrieval.
DE-08	Survivabilty	The degree to which a system can fulfill its mission, in a timely manner, in the presence of attacks, failures, or accidents.

Interoperability

ONE PARAGRAPH OVERVIEW

Details:

Performance

Taxonomy of Concerns

ID	Attribute	Concern
PE-01	Response Time	How long does it take the system to satisfy requests?
PE-02	Latency	How can the demand and resources change over time? What happens when system capacity is exceeded and not all events can be responded to in a timely manner?
PE-03	Throughput	To how many events can responses be produced over a given interval of time?
PE-04	Dynamic Capacity	How much demand can be placed on the system while continuing to meet latency and throughput requirements?
PE-05	Static Capacity	How many entities of a particular type can the system store?
PE-06	Modes	How can the demand and resources change over time? What happens when system capacity is exceeded and not all events can be responded to in a timely manner?

Usability

ONE PARAGRAPH OVERVIEW

Details:

What are the usability requirements?

Our main criteria for making the system usable is the difficulty of performing each high-frequency use case. Difficulty depends on the number of steps, the knowledge that the user must have at each step, the decisions that the user must make at each step, and the mechanics of each step (e.g., typing a book title exactly is hard, clicking on a title in a list is easy).

The user interface should be as familiar as possible to users who have used other web applications and Windows desktop applications. E.g., we will follow the UI guidelines for naming menus, buttons, and dialog boxes whenever possible.

PARAGRAPH

Details:

• Government customers will demand section508 compliance
• Support learnability with principles of Instructive Interaction
• The customer wants extensive on-line help, but is not demanding a printed manual.

Easier to use than current:

• Blood pressure cuffs
• Home BP monitors

Patient can:

• Ignore device
• Determine that device is functioning normally
• Observe a blood pressure and heart rate measurement

Device:

• Is automatic

Measurements taken regardless of patient behavior

• Allows manually initiated measurements