Progress, measuring

Fox, N.C., Freeborough. P.A. Brain atrophy progression measured from registered serial MRI validation and application to Alzheimer s disease. J. Magn. Res. Imag. 7, 1069-1075, 1997. 

The progress measurements are based on the typical construction activity breakdown and milestones shown in Table 15.2... 

The field supervision has established an accurate progress measurement system independent from the subcontractors. If this is not available, subcontractors progress reports can be used. In this case, it must be remembered that most subcontractors will over-evaluate progress by 5-10%. 

How will you track progress, measure results, and share learning ... 

The calculated progress measures of elementary tasks have to be aggregated and propagated upwards in the task hierarchy. In this way, the progress of complex tasks, of project phases and ultimately of the whole project can be estimated. The progress measures help the project manager to decide whether the project is on schedule or whether deadlines will be missed. 

M. A reaction exhibiting saturation kinetics in [1], where the true kinetic order is close to first order at high concentrations and closer to zero order at low concentrations, can show apparent power law kinetics with 0 < x < 1, as shown in Equation 27.9. This suggests that our power law form of Equation 27.8 should be applied only under conditions close to those used to determine the kinetics. This condition is easy to fulfil because reaction progress measurements are typically carried out under synthetically relevant conditions. 

A series of headspace analyses is carried out on the same sample, which is conditioned to equilibrium between each analysis step. From the progressive, measured decrease in concentrations determined, the analyte concentration in the original sample can be calculated. The theory is outlined below. 

One way to check the influence of coincidence is to perform a second measurement at a more dilute concentration. If the particle concentration ratio of the two measurements differs from the known dilution ratio of the two samples, some effects of coincidence in the first measurement are probable and the result should be discarded and a new dilution prepared to test the second sample. Progressive measurements should be made until the reported concentration ratio between two consecutive samples agrees with the toown dilution ratio. The highest concentration at which this occurs is then accepted as the uppermost concentration limit for the instrument used in measuring this material. No specific concentration limit can be specified since this will depend on the particle size distribution, instrument design, and the flow rate. The overall maximum concentration may range from a few particles to a few thousand particles per ml. 

---