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Foundational Software Quality Models: McCall, Boehm, and ISO 9126

McCall Software Quality Model (1977)

The McCall model breaks down the concept of quality into three capacities (or uses) important for a software product, from the standpoint of the user:

• Each use is decomposed into a number of factors that determine the quality of these capabilities. Since a factor is an abstract concept, it cannot be directly measured or evaluated.
• Each factor is decomposed into a set of criteria or basic properties, which in most cases are internal properties of software that do not depend on the observer (e.g., modularity, fault tolerance, ease of training, etc.).
• For most software developers, these criteria directly influence software quality.

Boehm Software Quality

Defining Science and Its Characteristics

What is Science?

Science, in the broadest sense, refers to a system of objective knowledge. In a narrower sense, science is a system of acquiring knowledge using the scientific method, as well as an organized body of knowledge gained through this type of research.

Characteristics of Science

The defining characteristics of science include:

• Factual: Science describes the facts as they are.
• Transcendence of Facts: It uses facts to produce new facts and explain them.
• Analytical: Science tries to discover the elements of each whole and the interconnections that explain their integration.
• Specialized: This characteristic results from the analytical approach.
• Clear and Precise: Science provides clarity and precision,

Likelihood: Resembles the real, credible.

Industrial Revolution Context: Characterized by wealth accumulation and poor working conditions. The primary reader was the Bourgeoisie.

Mimesis: A copy or imitation of reality.

Influence of the Scientific Method: Emphasis on observation.

This genre was widely produced and read, characterized by its capacity for detailed descriptive narrative.

Key Characteristics of Realism

1. Careful and detailed observation.
2. Description of the environment, customs, and characters (from different social classes).
3. Effect of objectivity.
4. Standard of plausibility (the narration can occur in extra-textual reality).
5. Intent: To contribute to social change.
6. Inclusion of voices belonging to different classes.

Narrative Techniques

Direct Speech:

Dramatic Subgenres

• Tragedy: Presents conflicts that cannot be solved by the characters, as they are marked by fate. The outcome is always unfortunate.
• Comedy: Shows everyday life issues and aims to entertain. The protagonists are ordinary people. The outcome is always happy.
• Drama: A conflict painful for the characters. The protagonists are common. It mixes tragic and comical elements, and the ending can be happy or unhappy.

Argumentative Texts in the Media

• Editorial: Sets out the terms of the means of communication on a topical issue. It is a text that is signed and employs formal vocabulary.
• Chronicle: Expanded news and commentary. Parts:
  • News: Objective information of events.
  • Comment: Exploring the journalist, usually performed in the third

Actions for Check Default

Non-payment of a check must be accredited by one of the following methods:

• By notarial protest.
• By a statement from the drawee.
• By a dated statement from a clearing or compensation system.

Understanding Credit Risk Databases

Key sources of risk information in Spain include the Risk Information Central Bank of Spain (CIRBE) and Asnef-Equifax.

Risk Information Central Bank of Spain (CIRBE)

CIRBE is a public service managed by the Bank of Spain. It maintains an extensive database of credit risk information, including loans, credits, and guarantees, that financial institutions hold with their customers. This allows any lender to ascertain the total debt their customers have with other institutions.

Asnef-Equifax

Asnef-Equifax compiles... Continue reading "Financial Risks & Payment Mechanisms Explained" »

What is a Software Prototype?

A prototype is an initial version of a system that is available early in the development cycle. They can be built with different technology from that used in developing the final version of the system.

Primary Uses of Prototyping

A prototype can be used for several purposes:

• To test the usability of the product design and interaction with the user;
• To assist in requirements elicitation (raising user needs);
• To validate requirements with users.

Key Features of Prototypes

Prototypes usually have features such as:

• Reduced functionality;
• Relaxed non-functional requirements, including performance, safety, and reliability.

Evolutionary Prototyping

Evolutionary prototyping aims to deliver an executable version of the system as quickly... Continue reading "Software Prototyping Methods and Best Practices" »

The Underpinnings of the Drive

If self-talk alone were enough to move us to survive, it would be the sexual drive, which is mounted on the gregarious instinct, forming self-preservation. This drive would then seek another. Sexuality in us is open to the world; the libido is what makes us feel sympathy or apathy towards another. The mother creates a kind of map through which desire travels in the newborn. When it goes beyond mere need, the baby can perceive a creature of altered demand. Need in us would be equivalent to instinct, but in humans, it is very rudimentary and insufficient.

The Mirror Stage: Image and Self-Formation

The Mirror Stage opens us to fundamental concepts, such as the kingdom of the image, which encompasses the imaginary, narcissism,... Continue reading "Psychoanalytic Concepts: Drives, Mirror Stage, Identity" »

Defining the Working Day and Time Limits

Working Time is the duration, measured daily, weekly, monthly, or yearly, that a worker dedicates to the execution of their duties.

• Maximum length: 40 hours per week.
• Number of ordinary hours shall not exceed 9 hours a day.
• Minimum rest between shifts: 12 hours.
• Workers under 18 years old cannot work more than 8 hours a day.

Exceptions and Constraints on Working Hours

Certain sectors have specific regulations regarding the extension or constraint of the working day:

• Extensions: Trade, catering, and the watchful guard of mariners in these three sectors can extend the working day.
• Constraints: Work in cold stores, construction works, and works exposed to environmental risks.

Mandatory Rest Periods for Employees

Types

Don Quixote: Cervantes' Masterpiece

Genesis

Don Quixote is Cervantes' masterpiece. It consists of two parts: the first was published in 1605 and the second ten years later, in 1615. The first is more spontaneous; it seems written on the fly. The second is much more thought out and responds to a well-laid plan. Both show some structural parallelism. The apocryphal Quixote is very interesting because it reveals the outrage that the publication of the first part of Cervantes would have caused in the circle of Lope de Vega. El Quixote de Avellaneda becomes a spokesman for a noble reaction to the intrusion that the nobility led to the claim of a mere gentleman, like Alonso Quijano, passing as a gentleman.

Characters

There are two central characters... Continue reading "Don Quixote: Cervantes' Masterpiece Unveiled" »

Text Classification and Types

Understanding how texts are categorized helps in analyzing their purpose and structure.

Entertainment Texts

These texts are primarily designed for enjoyment and leisure, focusing on engaging the reader rather than conveying critical information.

Informational Texts

An informational text is a type of communication through which the issuer provides the receiver with facts, situations, or circumstances.

Historical Texts

Historical texts recount facts, actions, characters, and past events, generally focusing on those most prominent in their respective time periods.

Persuasive Texts (Advertising)

Advertising involves the dissemination of texts and images that invite the audience to acquire certain commercial products or perform... Continue reading "Fundamental Concepts of Text Classification and English Grammar" »