Software Development Laws

Conway's Law - This law states that the organizational structure of the development team reflects in the code. Hierarchical organizational structure that are rigid can result in the poor architecture and code that would result in software that is too costly and hard to maintain.

Humphrey's Law - This law states that the users do not know the requirement until they see the software. User says "I Know It When I See It" (IKIWISI). But the traditional developer says that "What You See Is What You Get" (WYSIWYG). Here lies the problem and in my opinion may possibly contributes to the Ziv's law.

Ziv's Law - This law states that software development is unpredictable.

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Excel PMT Function

PMT function is very useful for calculating monthly payment required to payback a loan or mortgage at a fixed rate. This function require a minimum of three inputs, periodic rate, number of periods, present value or the loan amount. Here is a simple example. Home Loan: 350,000.00 Interest rate: 4.5% Number of years to repay the loan: 25 Note: To calculate monthly payment, we need to find the monthly rate and number of months as shown above. Then it is simply a matter of substituting the values into the payment function, as shown in the formula view below.

CUMIPMT and CUMPRINC function

CUMIPMT Cumulative interest payment function allows you to calculate the interest paid for a loan or from an investment from period A to period B. When getting a loan, CUMIPMT function can be used to calculate the total amount of interest paid in the first five months or from period 12 to period 20. A period can be a month, a week or two week. Loan Amount : 350,000.00 APR: 4.5% Down payment: 0.00 Years: 25 Payment per year: 12 From the above data, we can calculate the following: No of Period: 25 × 12 = 300 Periodic Rate: 4.5/12 = 0.375% Here is how you will substitute these values into the function. = CUMIPMT (periodic rate, No of period, vehicle price, start period, end period, ) = CUMIPMT (0.375, 300, 350000, 1, 5, 0) In an excel worksheet, we use cell address instead of actual values as shown below: Here is the formula view of the worksheet: CUMPRINC Another related function is CUMPRINC. CUMPRINC function is used to calculate cumul

A Comprehensive Evaluation of the Internal Consulting Process: Steps and Considerations

Introduction Internal consulting has emerged as a critical function within organizations, offering in-house expertise to solve complex business problems and drive change. It closely mirrors external consulting in methodology but is differentiated by the consultant's intimate knowledge of the organization and a vested interest in its long-term success. This article aims to evaluate the key steps involved in the internal consulting process, offering insights into each phase's significance and challenges. Steps in the Internal Consulting Process The internal consulting process can generally be segmented into five distinct stages: Initial Assessment, Data Collection and Analysis, Solution Development, Implementation, and Evaluation. Below is an evaluation of each step: Step 1: Initial Assessment Objective: To understand the problem or opportunity area and define the scope of the project. Significance: A well-defined scope ensures that the consulting project stays focused and manage

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