Lean Construction Ireland Annual Book of Cases 2021 15 manpower to meet the workload. It is also dynamic, allows for change to be accommodated, and enables ease of tracking. Figure 3, for the mechanical services, compares the delivery of technical submittals iterations for the current phase to the previous phase and is representative of all work packages analysed to date. Figure 3. Technical Submittal Number of Iterations The number of iterations required to achieve StatusA has reduced and the quantity of technical submittals being approved right first time has also increased. Right FirstTime Improvements Figure 4. Right First-Time Percentage The average right first time after implementation of LPS increased to 62.93%. The number of iterations post-first release has also reduced following the implication of the Mace LPS, resulting in significant improvements to the ratio of waste. Figure 5. Ratio ofWaste The ratio of waste is trending at 0.62 for the current project compared to 1.17 for the previous phase. For the Civil Work Package, the percentage right first time has marginally reduced, and Ratio ofWaste has marginally increased. However : • The CivilWork Package was starting from a higher success ratio for the previous phase compared to the otherWork Packages. • The Civil Work Package was the first work package to employ the last planner approach, which required a learning curve period to bed in. • The current project had a new design team and there is an element of trust building to be developed. For the current project, the quantity of requiredTechnical Submittals is trending at c.1,600 and projecting the ratio of waste would see c.1,600 number of Technical Submittals being presented c.2,592 times.Using LPS,we were able to measure and recognise variability and highlight trends to improve our productivity. If we did not introduce the Mace Last Planner to the submittal process, it would likely have seen the quantity of technical submittals being presented c.3,473 times – a delta of c.880. An analysis of the time spent by the project team to prepare and review submittals for re-review equated to an average of 110 minutes of ProjectTime.The reduced number of re-submissions has resulted in a project saving of c.1,163 man-hours. Figure 6. SubmittalTime Calculation Case 3