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# The Rule of 72

The Rule of 72 Four years ago, the big boss, 6'6" tall, 350 pound Mac Savage, said that the goal for the sales of a new product was at least...

# The Miracle of Soldering

Folks, Imagine you are Guglielmo Marconi, and you opened the first radio factory in Chelmsford England in 1912. Using Lee De Forest’s  1906...

# AI and Autonomous Vehicle Challenges: Common Sense, Flexibility, Dexterity, and Situational Awareness

Folks, I have been following advances in artificial intelligence (AI) and autonomous vehicles (AV) for some time now. At first, I was a cautious, then...

# Pareto Chart: Crucial in a Continuous Improvement Plan

Folks, The Pareto Chart is a simple way to plot failure data that gives priority to the failure modes with the highest number of fails. ...

# A Simple Explanation of Why the Commonly Used Equation for Alloy Density is Wrong

It still surprises me that my most popular blog topic in the 15 years (yikes!) that I have been blogging is how to calculate solder alloy density havi...

# Answers to the SMT IQ Test

Folks, Here are the answers to the SMT IQ Test of a short while ago. ...

Folks, Mary had worked at a small SMT “mom and pop” shop for 12 years. Business was always good and she moved up to CFO of the 60 per...

# The Holy Grail of Soldering: Low-Temperature Reflow – High-Temperature Use

Folks, soldering enables modern electronics. Without solder, electronics would not exist. Copper melts at 1085°C, yet with solder we can bond copp...

# The Limits of Mixing: A Real World Example

Folks, some time ago I posted on the limits of mixing. In modern manufacturing, there may be some applications that require two metal powders to be ev...

# Calculating Small P Values in Hypothesis Testing

Folks, Let's continue watching Patty help Mark to determine small P values in hypothesis testing. The first part of this story is here.  Patt...

# In Hypothesis Testing, the P Value Can't Be Zero.

Folks, we haven't checked on Patty in a while… As Patty walked into her office, her phone rang. “Hello, this is Professor Coleman,...

# Tin Pest in Medieval Culture

Folks, Readers may remember that I have had an interest in tin pest for some time. Tin pest can occur if nearly pure tin is exposed to cold temperatur...