When a line stops, the usual question is how long it lasted. A better question is where it stopped, at what hour and on which shift. A line interruption hotspot map plots every stoppage by position, hour and shift, so patterns that were invisible in a list become obvious. A door sensor that trips every afternoon or a transfer that jams after every changeover quickly stands out. To see how this could look for your own line, you can preview a hotspot map with our team.
Micro-stop and changeover losses
Find Out Where, When and on Which Shift Your Line Keeps Stopping
iFactory AI maps every interruption by position, hour and shift so recurring problem spots stand out and can be fixed at the source.
Three dimensions of every stop
PositionHourShift
Why maps beat listsPatterns Hide in Long Stop Lists
A list of stops shows what happened. A map shows where problems cluster.
Position
Which zone or machine stops most
Hour
What time of day problems peak
Shift
Which team or condition is linked
Product
Which SKU or pack size is involved
Many repeat problems have a simple physical cause. A map finds the place to look.
What you needFour Data Items Make a Hotspot Map
1
Stop timestamps
Start and end time for every interruption.
2
Position tags
Which zone, machine or sensor raised the stop.
3
Reason codes
What type of stop it was, even if simple.
4
Context
Shift, product and crew where available.
Most plants already have two of these. Position tagging is usually the missing piece.
A first lookAn Illustrative Heat Map by Zone and Shift
Colour intensity shows how many stops happened. This example is illustrative.
| Shift A | Shift B | Shift C |
|---|
| Zone 1 Infeed | Low | Medium | Low |
| Zone 2 Filler | Medium | Medium | Medium |
| Zone 3 Door | High | High | High |
| Zone 4 Labeller | Low | Low | Medium |
| Zone 5 Packer | Medium | Low | Low |
A cell that is high on every shift points to a machine or design cause. A cell that is high on one shift points to people, method or conditions.
See Your Own Line's Hotspots
Share a few weeks of stop data and see how iFactory AI would map interruptions by position, hour and shift.
Building the mapFour Steps From Raw Stops to Hotspots
1
Define zones
Divide the line into zones that match how teams talk about it.
2
Tag every stop
Assign each interruption to a zone automatically or with a quick tap.
3
Build the grid
Count stops by zone, hour and shift.
4
Highlight clusters
Rank the cells with the highest counts or time.
Keep zones simple. Five to ten per line is usually enough to start.
Reading the mapFour Patterns to Look For
Cluster
One zone with many stops
Repeat
The same stop at the same time each day
Shift pattern
A zone high on one shift only
Product link
Stops tied to certain products
Each pattern points to a different type of cause. Clusters suggest equipment, repeats suggest schedules or routines, and shift patterns suggest method or training.
A time viewAn Illustrative Heat Map by Zone and Time of Day
| Early | Mid-morning | Midday | Afternoon | Evening |
|---|
| Zone 2 Filler | Low | Medium | Medium | Medium | Low |
| Zone 3 Door | Medium | Medium | High | High | Medium |
| Zone 4 Labeller | Low | Low | Medium | Low | Low |
A midday and afternoon peak at the same zone suggests something that builds up during the shift, such as dust on a sensor, heat or fatigue.
A worked clue chaseWhy the Zone 3 Door Stops Every Day
Imagine the Zone 3 door sensor trips in every shift. The map suggests a physical cause. This example is illustrative.
| Clue | What it suggests | Next step |
|---|
| High on all three shifts | Not a crew issue | Inspect the sensor and door alignment |
| Peaks after midday | Heat, dust or vibration builds up | Check mounting, cleaning and temperature |
| Linked to one product | Product size or weight | Check guide settings and product clearance |
| No stops on maintenance days | Related to running conditions | Compare running and idle behaviour |
Frequency and durationPrioritise Hotspots by Impact
Hotspot profile
Short stops
Long stops
Many events
Fix first
Chronic small stops with big total cost
Plan a response
Rare long events need a standard response
Few events
Standardise the clear
Quick fixes can be made faster
Typical fixesSix Fixes That Often Follow a Hotspot Finding
Realign or replace a sensor
Fix mounting, cleaning or sensor type.
Adjust guides and transfers
Set to standard and check wear.
Add preventive checks
Schedule small, regular checks before the problem builds.
Change the routine
Adjust timing of cleaning, breaks or changeovers.
Improve training
Teach the known fix for the known stop.
Redesign the spot
Change layout or equipment where problems persist.
Start with the cheapest fix that addresses the likely cause. To plan fixes for your hotspots, ask our team for a hotspot action template.
RolloutFive Steps From First Map to Routine Habit
1
Pick one line
Choose a line with frequent short stops.
2
Tag positions
Agree zones and capture position for every stop.
3
Build and share the map
Show it at the weekly production meeting.
4
Fix the top hotspots
Assign owners and dates.
5
Update monthly
Compare maps and confirm the fixes worked.
Zones agreed with operators and maintenance
Every stop tagged with a zone
Stops tagged with shift and product
Weekly heat map reviewed by the team
Top three hotspots have named owners
Fixes checked with a before and after map
Maps updated monthly
Results shared on the line
Expert reviewWhat a Lean Manufacturing Coach Would Check First
Expert review
A map is a conversation starter. Its value comes from walking to the spot with operators and technicians and asking what they see there.
VerdictStrong when position tagging is simple and the map is reviewed on the floor.
Watch forBeautiful maps that nobody walks to and nobody acts on.
Do nextBuild a map for one line and visit the top hotspot with the team this week.
Frequently asked questionsWhat Food Plant Teams Ask About Hotspot Mapping
How do we tag stops by position?
Machine signals often reveal which sensor or machine raised the stop, which gives the position automatically. For anything else, a quick tap by the operator works. Keep the list of zones short and consistent.
See a position tagging example.
How many zones should a line have?
Five to ten zones are usually enough to start. Too few hides the problem and too many makes the map noisy. Match zones to how operators and technicians already talk about the line.
Ask about zone design.
What if the map shows stops everywhere?
That can mean the line has a general reliability problem or that zones are too coarse. Try splitting the busiest zones, comparing shifts and looking at stop types.
Discuss zone refinement.
Can maps show shift or crew differences?
Yes. Adding shift as a dimension shows whether a hotspot is present on every shift, which suggests equipment, or only on one, which suggests method or conditions.
Ask about shift analysis.
How often should we refresh the map?
Review it weekly in the production meeting and update it monthly to compare trends. After any fix, check the next map to confirm the hotspot has cooled.
Plan a review rhythm.
Where, when and why
Let the Map Show You Where Your Line Keeps Stopping
Book a session with iFactory AI to tag your stops, build a hotspot map and plan fixes for the spots that cost you the most.
