Program Development Life Cycle (PDLC)

The Program Development Life Cycle (PDLC) consists of the following stages: Analyse the problemAnalyse and define the problem, check and understand that the problem is clearly defined. What are the inputs /outputs, process steps, logic, rules and requirements.Design the solution (program)Design the solution using tools such as flow charts and pseudo-code.Code the programUse appropriate tooling … Continue reading Program Development Life Cycle (PDLC)

What is Agile?

Agile makes me think of the agile attribute used in role playing or when discussing comic book characters (e.g. Spider-Man). Agile in Software Engineering, and business, terms is very similar in that it is a mindset that helps deliver small incremental changes quickly. Like Spider-Man using several small quick jumps / web swings to get … Continue reading What is Agile?

Statistics: Descriptive vs Inferential, Population vs Sample (Notes)

Continuing on with my Data Analytics learnings, with a jump into Descriptive Statistics vs Inferential Statistics and an attempt to clear up Population vs Sample from my last blog post. Descriptive Statistics Descriptive statistics takes a sample, e.g. a group and records data about that sample. The data is then presented in summary statistics and … Continue reading Statistics: Descriptive vs Inferential, Population vs Sample (Notes)

Data Variability: Standard Deviation and Variance (Notes)

When discussing data variability (i.e. how much the values vary) there are two methods that can help. These are Sample Standard Deviation and Sample Variance. Other Terms That Are Needed Measures of Centre The middle or centre of the data. Measures of Spread How diverse from the Measure of Centre data is, or how concentrated … Continue reading Data Variability: Standard Deviation and Variance (Notes)

SQL vs NoSQL (Notes)

A quick overview of the differences between SQL and NoSQL. SQL Structured Query Language (SQL) is used for relational databases, which are table based. For example, an column in table A (e.g. User_ID) may have a relation with a column in table B (e.g. Order_Ref) and table B may have a relation to a column … Continue reading SQL vs NoSQL (Notes)