Inventory glossary
What is Product lifecycle?
Product lifecycle is the sequence of stages a product goes through from launch to decline: introduction, growth, maturity, and decline.
A Shopify store owner needs different ordering habits at each stage. A new candle scent needs small, careful first orders because there is no sales history yet. A hero product in its growth stage needs bigger, more frequent reorders to avoid stockouts. A mature product can run on steady reorder points. A declining product needs shrinking orders so you don't end up with boxes of stock nobody wants.
Knowing where a SKU sits in its lifecycle helps you decide how much weight to give recent sales data versus guesswork, and when to stop reordering altogether. Mixing up a new launch with a mature bestseller leads to either understocking a product that's about to take off, or overstocking one that's already fading.
Example
A candle store launches a pumpkin spice candle in September, its introduction stage, and orders 100 units with no sales history to go on. By November it is selling 40 units a week, clearly in growth, so the owner increases the reorder quantity to keep up. By February demand drops to 5 units a week, signaling decline, so the owner stops reordering and lets remaining stock sell through.
Common mistakes
- Treating a brand new product like a mature one and ordering too much on launch day.
- Not noticing a product has entered decline and continuing to reorder at growth-stage quantities.
- Judging lifecycle stage from one or two weeks of sales instead of a longer trend.
Product lifecycle and SteadyShelf
SteadyShelf builds its sales forecasts from each SKU's actual order history, so as a product moves from growth to maturity to decline, its suggested reorder quantities and order-by dates adjust along with it.
SteadyShelf is launching on the Shopify App Store. Join early access to get the install link first.
Related terms
Demand forecasting · Launch inventory · New product forecasting · Slow-moving inventory · Discontinued SKU
FAQ
How do I know what lifecycle stage a product is in?
Look at the sales trend over several weeks, not just the latest number. Rising week over week sales means growth, flat sales means maturity, and falling sales means decline.
Should I use the same reorder point for every stage?
No. A fixed reorder point works for mature products with stable demand, but growth stage products need it raised often and declining products need it lowered or dropped.
Let SteadyShelf do this math for every SKU
Order-by dates per supplier, seasonal forecasts and draft POs for your Shopify store. $29/month after a 30-day free trial.
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