Reactive Dyeing of Cotton: The Control Points That Decide Right-First-Time
RFT rates below 80 per cent are almost never a dye problem. They are a control problem — salt dosing, temperature ramp, liquor ratio and substrate preparation, in that order.
Salauddin Ahamed Sagar
Super AdminOperations Research Consultant
Salauddin Ahamed Sagar is an Operations Research Consultant focused on data-driven decision making across manufacturing, textiles, and industrial operations. He works with organizations to apply optimization, statistical analysis, and process engineering principles to improve efficiency, reduce cost, and strengthen supply chain performance.
27 published articlesbd.linkedin.com/in/salauddinahamed
EOQ or Periodic Review? Choosing an Inventory Policy That Survives Real Demand
The textbook EOQ answer is right about 40 per cent of the time. Here is how to decide between continuous and periodic review, and how to size safety stock so the service level you promise is the one you get.
Fire Load and Compartmentation in Multi-Storey Factories
How to calculate fire load density, what it implies for compartment size and fire resistance rating, and the evacuation arithmetic that decides whether your stairs are adequate.
From Spreadsheet to Forecast: Exponential Smoothing for Demand Planning
You do not need machine learning to forecast most industrial demand. You need the right smoothing model, an honest error metric, and a rule for when to override it.
Standard Minute Value: How to Calculate It and Why Your Costing Depends on It
SMV sits underneath your CM price, your line plan and your efficiency figure. Get the rating and allowances wrong and every number downstream is wrong in the same direction.
Preventive or Predictive? Building a Maintenance Program That Pays Back
Not every asset deserves vibration analysis, and not every failure is age-related. A criticality-driven method for deciding which strategy each machine actually needs.
Queuing Theory on the Factory Floor: Sizing Buffers Without Guesswork
Why a line running at 95 per cent utilisation has queues eight times longer than one at 80 per cent, and how to use that relationship to decide where buffer space is worth the floor area.
Trade Promotion Effectiveness: Measuring Lift Instead of Hoping for It
Most promotional analysis compares promoted weeks with the weeks before them, which systematically overstates lift. Here is how to build a defensible baseline and read incrementality honestly.
Statistical Process Control for People Who Do Not Like Statistics
Control charts fail in most factories because the wrong chart is used, limits are recalculated too often, and everyone treats them as specification limits. Here is the version that works.