The dip comes from broken recognition
A drop after a redesign usually means customers cannot find you, not that the product changed. Regulars remember the main colour, graphics and text position; replace all of it and a glance suggests the product is discontinued. The dip usually appears in the first month or two and recovers if the product itself is unchanged. Estimate that transition period in advance and prepare shelf guidance and staff explanations.
Separate assets from baggage
The first step is not a new layout but separating assets from baggage. Assets are the cues customers use: main colour, logo position, how the product name is written, size numbers, signature graphics. Baggage is outdated processes, inefficient layouts and stacked claims. List the assets and write them into the redesign principles; remove baggage boldly, confirm assets one by one.
How much to change depends on the problem
If the pack only looks dated or the hierarchy is messy, keep the main visual and adjust layout and information order. If category perception is wrong, a deeper change is needed — but in two steps, testing on new products first and then rolling out. The test: at three or four metres, can customers still tell it is you?
Validate after the change
Validate with more than sales. Run a small shelf test before and after, watching pick-up and enquiry rates; compare regular customers' repurchase intervals; online, watch search terms and detail-page dwell time. If numbers are off, check display and distribution before blaming design. Only validated changes should go chain-wide.
