Rheinwerk Computing Blog

How What-If Analysis Helps with Decision-Making in Excel

Rheinwerk Computing — Wed, 11 Mar 2026 13:00:00 GMT

In real-world planning—whether you’re forecasting revenue, evaluating loan terms, or comparing investment scenarios—you rarely work with a single fixed assumption.

Sensitivity analyses explore how a situation responds to changes in influencing factors. Excel provides two versions of what-if analyses that differ mainly in the number of variables they allow: The first version varies one value, and the second varies two. The number of variables also affects how the data is arranged for calculation, which varies between the two versions. Plus, the number of formulas that a version can evaluate depends on the number of variables, and only the single-variable version can evaluate multiple formulas at once.

What Are the 4 Principles of Cryptography?

Rheinwerk Computing — Wed, 04 Mar 2026 16:54:06 GMT

The main purpose of cryptography is to meet one or more of these security principles: confidentiality, integrity, authenticity, and nonrepudiation.

Implementing VPNs Using IPS

Rheinwerk Computing — Wed, 04 Mar 2026 16:53:58 GMT

Want to keep your data safe? Here’s how VPNs and IPsec have your back!

A Primer on Asymmetric Cryptography

Rheinwerk Computing — Wed, 04 Mar 2026 16:53:51 GMT

Cryptography is categorized based on the symmetry of the encryption key and encryption-decryption algorithms.

Choosing the Right IDE: What Are the Java Development Environments?

Rheinwerk Computing — Wed, 04 Mar 2026 16:47:30 GMT

From IntelliJ IDEA to Eclipse and beyond, discover how modern IDEs simplify Java development for beginners and experienced developers alike, offering tools like syntax highlighting, code completion, and powerful project management features.

How Task Cancellation Works in Swift

Rheinwerk Computing — Wed, 04 Mar 2026 14:00:02 GMT

Long-running operations are common in modern Swift applications—from network requests and file processing to background data synchronization.

What Special Characters Mean in Bash Shell Programming

Rheinwerk Computing — Wed, 25 Feb 2026 14:00:02 GMT

When working in the Bash shell, special characters aren’t just punctuation, they’re control mechanisms.

Creating an Anaconda Account and Opening Your First Notebook

Rheinwerk Computing — Wed, 18 Feb 2026 14:00:02 GMT

Before you start building models in Python or R, you need astable environment—here’s how Anaconda helps you manage dependencies and get coding quickly.

Why the Single Responsibility Principle Matters in Practice

Rheinwerk Computing — Wed, 11 Feb 2026 14:00:02 GMT

Software systems rarely fail because of a single large mistake. More often, they fail because small, seemingly reasonable changes interact in unexpected ways.

What the Conv2D Layer Does in Convolutional Neural Networks

Rheinwerk Computing — Wed, 04 Feb 2026 14:00:00 GMT

Convolutional neural networks process images very differently from the fully connected networks.