← BackChargeMix.

Recipes For Metal,
Priced In Real Time

Turning a paper-and-gut-instinct charge-mix recipe into a data-backed, price-aware web workflow for foundry teams.

Foundries in the metal-manufacturing sector still rely heavily on paper records, Excel sheets, and gut instinct to manage operations. A critical part of their process — creating the "charge mix" (like a recipe for each melt) — is done manually, without real-time price data or decision support. As a result, they often miss out on potential profit margins due to a lack of market-driven adjustments and limited use of technology in charge-mix creation.

Role
Sole Product Designer & UX Researcher
Domain
Industrial B2B · MetalCloud Platform
Team
4 Members (IC)
Duration
30 Days
00

The design process

An eight-step process carried the project from raw field research to a shipped, adopted product.

1
Understand the Existing System
2
Define the System
3
Identify Pain Points
4
Ideate for Solution
5
Create Designs & Develop
6
Usability Testing & MVP Launch
7
Product Updates
8
Impact Showcase
01

Understand the existing system

Through on-ground research, we discovered that while each foundry has its own way of using ChargeMixes, they typically follow a standard process to create them. Once a ChargeMix is created for a specific grade, it rarely changes. The methods used to build these ChargeMixes also vary — some rely on pen and paper, while others use Excel spreadsheets.

A charge-mix board on a foundry wall next to a handwritten chemical composition notebook
Workers on a real foundry floor near a furnace
Jargon, quickly
Foundry — a place where raw materials are melted into molten metal, then poured into moulds to produce parts. ChargeMix — a recipe of raw materials followed to hit the exact chemical composition a product needs. Melting process — the sequence a foundry follows to turn raw material into a poured, finished part.
02

Define the system

Based on our research, we've gained a clear understanding of how foundries approach ChargeMix creation. They generally adhere to a standardized process — Input, Calculate, Output — for developing these mixes, as shown below.

Target Product Requirement — Metal Grade, Part Name, Part Number, CE Value, Target Chemistry
Along with Raw Materials — in-house and market-procurable materials, yield, chemical composition
Considering Furnace Capacity — maximum possible output from a single heat
Conducting Calculations — melting supervisor calculates the mix manually or in Excel
ChargeMix Creation — the ChargeMix is created and stored as an Excel file, or written manually
03

Identify pain points

After conducting user interviews and analysing the system, we pinpointed key challenges, their underlying causes, and actionable opportunities. This process revealed three significant pain points.

01
While creating a ChargeMix, raw material price is not considered.
02
Manual calculations incur human errors.
03
Loss due to multiple experimental heats.
12%
Opportunity of Cost Saving (approx)
04

Ideate for solution

After compiling insights from both secondary and primary research, our team collaborated to brainstorm and conceptualise the Minimum Viable Product (MVP).

01
Idea Finalization
Building a ChargeMix module on a web platform.
02
Plan of Implementation
Launch the MVP with the least effort/cost possible — just the ChargeMix screens, with everything else manually fed to the back end of the system. Check if it hits Product-Market Fit (PMF), then refine the project and add other features as and when required.
03
Cost Benefit Analysis
Cost — actual design & development of the MVP module, plus sales & onboarding testing of the product with 5 customers.

Benefit — a market size of 5–7K foundries in India (~85–95% in the MSME segment), a selling price of ₹30K/year, a sales plan of 50 customers/year, on a yearly subscription model.
05

Create designs & develop

Once we had ideated on our Minimum Viable Product, we moved directly into designing the initial visual interfaces of the web app. This was quickly followed by its development for testing and launch, ensuring a swift progression from concept to a tangible product.

Task Flow
ChargeMix task flow
UI Visuals
Web app UI mockups showing the ChargeMix builder
06

Usability testing & mvp launch

Once the Minimum Viable Product was ready, we immediately began usability testing with actual users. This crucial step helped us assess the product's feasibility and identify any issues, which we promptly addressed. After reaching satisfactory usage parameters, we proceeded with an MVP launch in a beta phase — validating our hypotheses through real-world market adoption.

On-site usability testing at a foundry
07

Product updates

Upon launching the MVP to the market, our sales and onboarding teams' dedicated efforts successfully secured our initial customers. Reaching the five-customer mark validated our MVP and confirmed Product-Market Fit (PMF). With this crucial validation, we proceeded to refine the product, developing additional modules for Grades and Inventory.

01
Grades

A dedicated module for managing metal grades used across ChargeMix recipes.

Grades module screenshot
02
Inventory

Tracks raw material stock and pricing feeding directly into the ChargeMix calculation.

Inventory module screenshot
08

Impact showcase

Since inception, monthly total users have climbed steadily as more foundries adopted ChargeMix.

Monthly total users, since inception
03570105140
Tangible benefits & user voice
Owner
500-ton foundry, Maharashtra

“With ChargeMix, we've streamlined our material planning. It's cut down our manual effort and made it easier to maintain consistent output at lower costs.”

Owner
100-ton foundry, West Bengal

“MetalCloud's ChargeMix module helped us reduce production costs by guiding us toward more affordable raw materials — all without compromising on quality.”

R&D of future products
Because of this project's success, we were able to build relations with our customers and get access to their manufacturing units for future development of existing & new products.
A recipe is a pricing decision in disguise.
Why it matters

Foundries were treating charge-mix creation as a fixed recipe, when raw material prices move daily. Bringing price data into the calculation turned a static habit into a live cost-saving lever.

What I took from it

Shipping the leanest possible MVP — just the ChargeMix screens, everything else fed manually — to validate demand before investing in the Grades and Inventory modules the data later asked for.

Sayan Majumder
Product Designer & UX Researcher · ChargeMix, 2025
ChargeMix.
Said By People Who Aren’t Me
  • Saffin Mathew

    Vice President, 1M1B

    Sayan is a promising designer and very creative with his designs. I have had the opportunity to work with Sayan over the last 3 years on different projects and designs. He understands the creative briefs well and delivers what is desired. He is very easy to work with and is a true professional. As a designer at 1M1B, Sayan has created designs for most of our programs over the last 2 years, designing everything including brochures, reports, certificates, social posts etc. Would recommend Sayan for any design work.

  • Vikas Badami

    CEO, PeopleGamez.com

    Sayan is an exceptional designer — his creative thinking on serious gaming interactions brought a completely new perspective to our projects.

KOLKATA

15:33

IST
©2026
Said By People Who Aren’t Me
  • Saffin Mathew

    Vice President, 1M1B

    Sayan is a promising designer and very creative with his designs. I have had the opportunity to work with Sayan over the last 3 years on different projects and designs. He understands the creative briefs well and delivers what is desired. He is very easy to work with and is a true professional. As a designer at 1M1B, Sayan has created designs for most of our programs over the last 2 years, designing everything including brochures, reports, certificates, social posts etc. Would recommend Sayan for any design work.

  • Vikas Badami

    CEO, PeopleGamez.com

    Sayan is an exceptional designer — his creative thinking on serious gaming interactions brought a completely new perspective to our projects.

KOLKATA

15:33

IST
©2026
Said By People Who Aren’t Me
  • Saffin Mathew

    Vice President, 1M1B

    Sayan is a promising designer and very creative with his designs. I have had the opportunity to work with Sayan over the last 3 years on different projects and designs. He understands the creative briefs well and delivers what is desired. He is very easy to work with and is a true professional. As a designer at 1M1B, Sayan has created designs for most of our programs over the last 2 years, designing everything including brochures, reports, certificates, social posts etc. Would recommend Sayan for any design work.

  • Vikas Badami

    CEO, PeopleGamez.com

    Sayan is an exceptional designer — his creative thinking on serious gaming interactions brought a completely new perspective to our projects.

KOLKATA

15:33

IST
©2026

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