Spreadsheets vs Integer Demand: Choosing a Demand Planning Workflow

Spreadsheets are useful — until maintaining the process becomes the work.

Spreadsheets remain useful for flexible analysis, early-stage planning, custom calculations, and ad hoc questions. The friction grows when a recurring planning process depends on manual refreshes, fragile formulas, multiple versions, inconsistent assumptions, and a disconnected path from forecast to reorder decision.

Integer Demand is designed to support that recurring workflow in one place: data uploads, forecast workflows, inventory projections, policy and constraint inputs, purchase recommendations, saved outputs, and reviewable warnings. It does not make the planning decision for you; it helps make the inputs and review steps easier to follow.

Compare the workflow, not just the file format

Capability	Spreadsheets	Integer Demand
Setup and flexibility	Flexible for early-stage planning, custom calculations, and ad hoc analysis.	A structured workflow with CSV and Excel uploads for repeatable planning inputs.
Recurring data refresh	Often depends on manual refreshes, copied formulas, and file conventions.	Centralizes uploads and saved outputs so each planning cycle has a clearer starting point.
Forecast workflow	Can support custom models and assumptions, but the process is maintained by the planner.	Supports a repeatable forecast workflow with reviewable outputs and warnings.
Stockout-aware history	Can record stockout periods, but flags and adjustments usually require deliberate setup.	Supports stockout-aware demand history in the forecast workflow.
Inventory and reorder decisions	Formulas can connect demand, inventory, and reorder logic when maintained consistently.	Connects forecast workflows with inventory projections and purchase recommendations for review.
Lead-time, MOQ, and policy inputs	Inputs can be modeled, but the source values and formulas need ongoing coordination.	Centralizes policy and constraint inputs to inform purchase recommendations.
Reviewability and audit trail	File history and change notes can help, if the team maintains them.	Keeps saved outputs and reviewable warnings alongside the planning workflow.
Collaboration and version control	Works well with shared conventions, but multiple copies can create version questions.	Provides one place to review planning inputs and outputs instead of passing files between steps.

Choose the workflow that fits your operating context

How to evaluate any forecasting workflow

A trustworthy evaluation should test the workflow against data it did not use to make the forecast. Use rolling out-of-sample tests so each period is evaluated using only the information available at that point in time.

• Measure MAE plus bias: MAE shows typical error size, while bias shows whether forecasts tend to run high or low.
• Compare with a simple baseline and FVA: A transparent benchmark provides context, and Forecast Value Add helps identify whether each planning step improves the result.
• Review data quality: Check dates, missing periods, returns, promotions, product changes, and other factors that can affect the history.
• Treat stockout periods separately: Observed sales during a stockout may not represent unconstrained demand, so assess those periods explicitly rather than hiding them in one overall score.

This is evaluation guidance, not a promise that any one tool automates every test or that a single metric predicts inventory results. Pair forecast measures with inventory outcomes and planner review.

Frequently Asked Questions

Can I keep using Excel with Integer Demand?

Yes. CSV and Excel uploads allow a gradual workflow: you can keep source files and bring the relevant data into Integer Demand for forecasting, inventory projections, purchase recommendations, and reviewable outputs.

Does Integer Demand completely replace spreadsheets?

No. Integer Demand can work alongside spreadsheets. You can use spreadsheets for flexible analysis or custom calculations while using the platform to support recurring forecast and reorder workflows.

Does demand-planning software guarantee fewer stockouts?

No. Integer Demand does not guarantee fewer stockouts. Results depend on data quality, inventory and supplier constraints, execution, and human review.

How should I compare forecast quality?

Use MAE plus bias, a simple benchmark or Forecast Value Add (FVA), rolling out-of-sample tests, data-quality review, and separate treatment of stockout periods. Also review inventory outcomes rather than relying on one accuracy number.

How much does Integer Demand cost?

Integer Demand costs $14/month for the Standard plan with standard pricing. It includes a 7-day free trial, requires no credit card, and has no long-term contract.