RPS Earthworks - Work Order Quality Map
When you are constructing a surface, the quality metric is a representation of how well the constructed surface matches the design. When you upload the Design surface to the Work Order, you also specify a High and Low tolerance setting. The tolerances provide the band around the surface that is acceptable on completion. For example you may enter a tolerance of 0.1m High and Low of the design giving yourself a 0.2m band that is acceptable i.e. the condition within which the surface passes or is considered to have quality.
If the surface is finished too low (below the tolerance band) or too high (above the tolerance band) then the surface in those areas is considered not finished or out of tolerance. When the entire constructed surface fits within the tolerance band, then you will have 100% quality.
The quality metrics are as follows
- Total surface area (this is the plan area of the Design surface)
- % of the surface at grade (in tolerance)
- % of the surface out of tolerance (Cut) (this means too high and need to Cut to get to grade)
- % of the surface out of tolerance (Fill) (this means too low and need to Fill to get to grade)
While constructing the surface the % of the surface at grade is an indicator of progress towards completion, however it will only be in grade in any location when it is close to grade.
The Quality Metrics display of a Work Order, creates a color coded map of the design surface area and shades the areas of the surface using colors defined in the RPS Earthworks Settings. The settings that control the Quality Metrics display are the Quality colors as shown below.
Currently the Min Max range of a Quality Chart is computed as 2x the greater of Max Cut or Max Fill for the Work Order. i.e. if the Stating Elevation is 100 and the target design elevations are 93 to 112 after Cut and Fill operations then the Max value is +/12m or a 24m range (to keep it symmetrical). The Cut and Fill ranges are then set to 50% of that i.e. +12m to -12m.
- Green - In Tolerance
- Orange - Near Tolerance
- Light Red - Out of tolerance high - band 1
- Deep Red - Out of tolerance high - band 2
- Light Blue - Out of tolerance low - band 1
- Dark Blue - Out of tolerance low - band 2
The top and the bottom of the green band will be the high and low tolerance setting for the work order.
The near tolerance band starts at the top or bottom of the high or low tolerance and extends to the first % value that you enter. The % value that you enter is a percentage of the computed min max range of the work order. This allows you to see color bands in the map while construction is progressing before the surface is nearing completion at any location.
When you are doing your final checks on a surface, the entire surface should fall between the green and orange bands, so set your first band at the point at which you want to know that you are nearing completion e.g. 2% of a 24m range is 0.48m, 1% would be 0.24m etc. You can enter integer values between 0 and 100% only at this time.
The second color band is your second indicator of progress towards completion - set this value to give you a good indication that the work is progressing - a value like 5% or 10% or 20% would be a good choice 5% of a 24m range would be 1.2m, 10% would be 2.4m and 20% would be 4.8m).
All other elevations in the surface being constructed will report as deep red or deep blue if they are above or below the second band % value that you select.
The resulting color map for a Quality Metric will look something like the following - in the example shown, all of the data is high compared to design, the green area shows the work that has been completed and the surface is at grade, the orange shows the surface areas that are above the high tolerance to within 0.2m and the red shows areas that are between 0.2 and 4m and 4m+.
Note that within a color band (as can be seen clearly in the orange band in the map below, is graduated from light to dark within the band also, to give an indication of the transition across the band.
In the top right hand corner of the map above the color legend you can set the date / time that you want to review the quality map for. The quality map is always the comparison of the date and time surface to the design surface.