How Do We Measure
Successful Use Of
Precut Turb-O-Webs ?
A new user of Precut Turb-O-Webs will want to measure the extent of benefits fairly quickly after adopting the system.
In other words, “What benefit have precut webs been to the plant?”
We Measure Success This Way :
Success is easily measured by calculating a single percentage, over, say a three (3) month period.
That percentage is “The number of Precut Turb-O-Webs which were used in a batch of jobs expressed as a percentage of all other parts, both chords and webs, which were cut in-plant for the same jobs”
This percentage can be easily determined by one of the numerous reports generated by modern truss design software programs.
For a successful outcome we would expect that this percentage would be around the 33% mark.
Let’s be perfectly clear about what we are measuring here- we are measuring the number of Turb-O-Webs used as a percentage of the parts still cut in-plant.
We use this percentage because it precisely measures the time and workload eliminated from the saw.
For example, let’s say that over a 12 week period a plant completed truss jobs containing 200,000 chords and webs.
[As I have said elsewhere in this website, a reasonable assumption is that of the 200,000 parts, chords and webs would be about 100,000 pieces each and about half of the webs (50,000) could be replaced by Precut Turb-O-Webs]
So in this analysis we could expect that the plant would use 50,000 precut Turb-O-Webs and cut 150,000 chords and webs in-plant. 50,000 is 33% of 150,000.
This percentage is the most useful since it represents the amount of extra saw work the plant would have had to do to complete the jobs measured – if the plant did not use precut webs.
So in this example, we say the plant processed 150,000 cut in-plant parts and used 50,000 precut Turb-O-Webs over a 12 weeks period. — Had the plant not used precut webs then the saws would need to work harder to compensate- 33% harder.
It may even take the plant up to 16 weeks without precuts to match 12 week output with precuts.
In any event there would need to be significant changes in the saw shed.
This is represented graphically below:
What Can Cause This Percentage To Vary.
Our observations over the years support that the 33% figure is a reasonable estimate, but it could vary.
For example, over a 3 months range of jobs the percentage of webs to chords would be unlikely to be below 45%. The percentage of webs being able to be replaced by precut Turb-O-Webs is usually in the range of 50-65%. So it would be unlikely to be below 50%.
So if webs/ chords was only 45% and Turb-O-Webs/ webs was 50% the 33% target figure would become only 29%.
On the other hand if webs/ chords was only 45% and Turb-O-Webs/ webs was 60% the 33% target figure would become 37%.
So the 33% seems reasonable, and is in accordance with results being achieved by users.
A Final Thought
We have been talking about adding one Turb-O-Web for every 3 parts cut in-plant.
Even adding one precut Turb-O-Web to four other parts cut in plant is good.
That is still equivalent to an extra day’s saw output per week !
Obviously adding precut webs to your saw’s output will boost the number of cut truss parts to the jig.
At the same time precut Turb-O-Webs provide a pathway to increased truss production.
Our chart below shows a few different scenarios to boost saw output by using Precut Turb-O-Webs.