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Waterfall Methodology

Waterfall Methodology is used by most federal and state agencies and businesses that rely on these agencies. It is also used by the vast majority of projects that are not software-centric. It utilizes a phased and structured approach to software development. It assumes every requirement of a project can be identified before design and coding begins. It tells the team's developers everything that needs to be in the software before it is up and running. It follows a waterfall approach. Development teams only have one chance to get each aspect of a project right.

Steps in Waterfall Methodology

1. Requirements Analysis
2. Design
3. Coding
4. Integration
5. Testing
6. Deployment

Traditional "waterfall" development depends on a perfect understanding of... Continue reading "Waterfall vs. Agile: Choosing the Right Project Management Method" »

Freedom and Human Nature

Humans, though possessing instincts, are not determined by nature. Thanks to our rational capacity, we can choose among a number of possibilities. This capability is known as freedom.

However, certain factors in our behavior do not depend on us. No one chooses their birthplace, gender, or skin color. These are given to us and constitute what Ortega y Gasset called circumstances.

To be free means to be responsible for our actions and accept the consequences of our behavior. Responsibility involves attributing success to our work and accepting failures or errors. If we make a mistake, we must rectify it and accept the punishment.

Moral Norms

A norm is a pattern that governs our behavior, a rule about how we should act. For... Continue reading "Freedom, Responsibility, and Moral Norms: A Philosophical View" »

Benefits of Supplier Partnerships

• Partnering can lead to continuous improvements in key areas such as processes, products, customer-supplier relationships, and customer satisfaction.
• Spreads risks, creates team flexibility, and reduces costs.
• Internal partnering can improve relationships among employees and departments, enhancing competitiveness.

Mandatory Requirements of Supplier Partnerships

1. Supplier and buyer personnel who use the products should meet to identify and implement necessary improvements.
2. Negotiations should focus on achieving the optimal deal considering price, features, quality, and delivery, rather than solely on price.
3. The supplier's quality process should guarantee product quality, eliminating the buyer's need for inspections.
4. The

Stop Indications in CTC Territory

At a signal displaying a Stop indication, if no conflicting movement is evident, the train will be governed as follows:

• A crew member must immediately contact the Control Operator (CO), unless the train is within Track and Time (T&T) limits or entering T&T limits from any point other than either end.
• When a train receives these instructions: “After stopping (train) at (location) has authority to pass signal displaying Stop indication,” the train must then move at restricted speed.

Manual Interlockings Operating Procedures

At a signal displaying a Stop indication in manual interlockings, the crew must immediately contact the Control Operator (CO).

Before proceeding into or continuing in CTC Territory,... Continue reading "Railway Operating Rules: Signal Indications and Switch Procedures" »

Conditions for Movement Authority

• Have received a proceed signal at the next control point.
• Have occupied the next control point.
• Have reached the end of CTC or Manual interlocking limits.

Relaying Authority to Pass a Stop Signal

When direct radio communication is possible, do not allow another employee to relay the authority to pass a signal displaying a Stop indication. When another employee must relay this information, the employee must be qualified on the GCOR.

Switch Correspondence

A flashing switch indicates the switch is out of correspondence. If any of the following conditions are observed, the switch at that location cannot be considered lined and locked unless otherwise advised by signal personnel or another qualified employee at the location:... Continue reading "Railway Operating Rules: Signals, Switches, and Movement Authority" »

Track Release Time Procedures

When reporting track release time, ensure the following details are communicated:

• Location being reported past or Track Warrant (TW) limits that were released.
• Time Track Warrant (TW) was partially released.
• Question: “Is that correct, over?”

Overlap Circuit Management

When a report is received, or the Train Dispatcher (TD) becomes aware a train has passed an overlap circuit without permission:

• Advise the train involved to stop and remain stopped until further instructions are received from the Chief Dispatcher (CD).
• Immediately notify the Chief Dispatcher (CD).

Contingent Authority Issuance

Do not issue Track Warrant (TW) authority contingent upon a condition. Issue authority only after any authorized train movement... Continue reading "Essential Railway Operating Procedures for Safety" »

Operational Procedures and Authority Confirmation

40.7.2 Repeated Correctly

After issuing authority or any instruction, and it has been repeated back correctly, or the "OK" has been acknowledged, respond with “That is correct”.

Confirming Limits Before Granting Authority

1. If authority can be granted as requested, restate the limits to the requesting employee for confirmation.
2. If confirmation is received from the employee, issue authority with no change in the confirmed limits.
3. If unable to grant authority with limits as requested, state the limits that can be given, asking the employee if they are usable.
4. If changed limits are usable, require the employee to repeat the changed limits to confirm understanding before issuing.

Authorizing Return Movement

What Is a Creole Language?

A creole language, or simply a creole, is a stable natural language that has developed from a pidgin, i.e., a simplified version of a language. Creoles differ from pidgins because creoles have been nativized by children as their primary language. As a result, they have features of natural languages that are normally missing from pidgins, which are not anyone's first language.

The Etymology of the Word 'Creole'

The English term creole comes from French créole, which is cognate with the Spanish term criollo and Portuguese crioulo. All descend from the verb criar ('to breed' or 'to raise'), which comes from the Latin creare ('to produce, create').^[15] The specific sense of the term was coined in the 16th and 17th centuries... Continue reading "The Formation and Characteristics of Creole Languages" »

Distributed Data Processing Concepts

Centralizing Data in Distributed Systems

How Data is Centralized in DDP

The data is stored centrally but updated or processed at the local (remote) site. Data is retrieved from the centralized data store, processed locally, and then sent back to the centralized data store.

Centralizing Standards in DDP Environments

Importance of Centralized Standards

The relatively poor control environment imposed by the Distributed Data Processing (DDP) model can be improved by establishing some central guidance. The corporate group can contribute to this goal by establishing and distributing appropriate standards for systems development, programming, and documentation to user areas.

Disaster Recovery Strategies

Key Methods for

A Story of Contrasts

The film Witness, directed by Peter Weir, effectively portrays several distinct ideas, including the cultural clash between the Amish and modern society, the romance between the two protagonists, and the theme of good versus evil, highlighting corruption within the police force. These central themes, combined with effective cinematic elements, justify the film's status as a memorable cinematic experience.

The Amish and the Modern World

Witness is a thriller centered on the Amish community living in Pennsylvania. A young Amish boy, Samuel, and his widowed mother, Rachel, become caught in a clash between two worlds: the modern American society, marked by greed, violence, and corruption, and the peaceful Amish world, focused... Continue reading "Witness: A Cultural Clash and Timeless Romance" »