The hottest Quality control Substack posts right now

And their main takeaways
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How to Perform a Mass Balance: Step‑by‑Step Guide + Downloadable Worksheets

The Rotten Apple • 42 implied HN points • 02 Mar 26
🍲 Food & Drink Quality control
  1. A mass balance reconciles incoming materials with finished product, waste, and stored material using the simple equation Mass In = Mass Out + Mass Stored.
  2. You run a mass balance to spot and document deviations from expected yield so problems can be investigated and the results defended in an audit.
  3. The guide gives step‑by‑step instructions and downloadable worksheets to record inputs, outputs, rework, and yield so you can do a clear, factory‑floor mass balance.

The Big Myth About Growing Cannabis

Mindset Value • 393 implied HN points • 13 Apr 23
💼 Business Quality control
  1. Growing high-quality cannabis consistently at scale is extremely challenging.
  2. Investors and some individuals underestimate the complexities of large-scale cannabis cultivation.
  3. Successful cannabis cultivation at scale requires operational excellence and constant adaptation to consumer preferences.

Avio under the microscope

Europe in Space • 196 implied HN points • 20 Mar 23
💼 Business Quality control
  1. Avio received a significant funding from European Union for space programs, raising questions on allocation of funds.
  2. Avio faced quality control issues in rocket launches, leading to failures and significant financial losses.
  3. Avio's financial activities, CEO remuneration, and conflicts of interest are under scrutiny amidst stock buybacks and public funding support.
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218 | A Practical Guide to Food Safety Consultants |

The Rotten Apple • 21 implied HN points • 08 Dec 25
🍲 Food & Drink Quality control
  1. Food safety consultants can design and fix food safety systems, run audits, train staff and help manage recalls. Define your needs up front, check credentials and references, agree the scope and costs (often US$50–$300/hr) before hiring.
  2. Lawsuits over ultra‑processed foods are growing and could widen legal scrutiny of big food makers. Food safety professionals should watch these cases and review their job responsibilities and contracts since legal actions might try to involve technical staff.
  3. New free food fraud resources — including a public database and a collection of ten case studies — are available to use in training and prevention. Use these curated materials and news to improve fraud detection, supplier checks and staff awareness.

The Lab #40: start a web data monetization project with Data Boutique

The Web Scraping Club • 78 implied HN points • 08 Feb 24
🕹 Technology Quality control
  1. Data Boutique is a marketplace for legally obtained web-scraped data with a focus on quality and easy accessibility.
  2. Sellers on Data Boutique align interests with the platform by offering affordable, high-quality data which encourages more purchases and recurring buyers.
  3. Ensuring data quality on Data Boutique involves embedded checks and a Peer Review program, promoting stackable standard data schemas for wider use cases.

Manufacturing PCBs with controlled impedance

Only Wonder Knows • 98 implied HN points • 02 Jun 23
🕹 Technology Quality control
  1. Manufacturing PCBs with controlled impedance involves extra cost and needs to be well understood and justified.
  2. To determine when controlled impedance of PCB traces is needed, consider factors like trace width, dielectric material thickness, and manufacturing tolerances.
  3. Measuring characteristic impedance in PCBs involves complex processes, manual testing, and cost implications that should be discussed with the manufacturer.

The Work of Net Zero

Oliver Bateman Does the Work • 78 implied HN points • 07 Aug 23
🎭️ Culture Quality control
  1. Quality over quantity is crucial in social media reach for some individuals
  2. Maintaining a static follower count or even encouraging negative growth can be a deliberate choice
  3. Striving for quality content and avoiding pandering is a key focus for some in the social media realm

EviziaDx PRECYSE - An AFM for DNA QC

ASeq Newsletter • 29 implied HN points • 22 Aug 25
🔬 Science Quality control
  1. EviziaDx PRECYSE is a new tool for checking the quality of DNA samples using advanced imaging techniques. It allows scientists to see individual molecules and measure their lengths accurately.
  2. This tool uses atomic force microscopy (AFM), which is quite expensive and needs special conditions to work properly. Despite these challenges, the images produced are very fascinating.
  3. Instead of traditional methods like electrophoresis and UV-spectroscopy, this technology offers a more detailed look at DNA fragments, pushing boundaries in DNA quality control.

A Tale of Two Ships

Gordian Knot News • 241 implied HN points • 05 May 23
💼 Business Quality control
  1. Regulatory inefficiency can drastically increase costs, sometimes by a factor of 30.
  2. Nuclear power regulation, a refined form of Navy regulation, can also lead to similar cost issues.
  3. The difference between the ideal cost and the actual cost can vary greatly due to market conditions and standards.

Something's Rotten in the State of Washington

Ulysses • 6 HN points • 22 Mar 24
💼 Business Quality control
  1. Boeing faced a downward spiral due to mismanagement involving outsourcing, cost-cutting, and layoffs. These actions affected safety, reliability, and led to tragic consequences.
  2. The decision to outsource important design work to international centers, such as in Moscow and India, resulted in errors and quality issues due to inexperienced engineers and layoffs of experienced staff.
  3. The lack of quality control and oversight in Boeing's manufacturing processes led to significant issues, including faulty oxygen systems and non-conforming parts, raising serious concerns about aviation safety.

Breaking Batches: How Batching Undermines Agile Software Development

Wisdom over Waves • 0 implied HN points • 25 Jan 24
🕹 Technology Quality control
  1. Quality is proportional to the quantity of feedback - more feedback means better quality.
  2. Batching is inversely proportional to quality - more batching leads to lower quality.
  3. Decreasing batching can be done through an Agile mindset, automated Continuous Integration/Deployment, feature toggling, early testing, breaking down large features, using MVP approach, and improving team communication.

A Slight Espresso Retraction

laserllama's blog • 0 implied HN points • 10 Dec 25
🍲 Food & Drink Quality control
  1. The author recently replaced their espresso machine after being unhappy with the previous one, emphasizing the importance of a good user experience.
  2. They are excited about their new ECM Sychronika 2 machine and are also using a Compak Cube autotamper to improve their coffee-making process.
  3. The author is experimenting with a special water treatment method to enhance the quality of their coffee.