# Enhancing Industrial Processes Through Augmented Reality: A Scoping Review
## 5 Conclusions
\begin{table}
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**Title** & **Before AR Implementation** & **After AR Implementation** & **Percentage of Optimisation (\%)** \\ \hline An Augmented Reality System for Operator Training in the Footwear Sector [33] & Time spent by trainers with interruptions in their work with AR (\% of total hours of total training hours) 20/100\% & Time spent by trainers with interruptions in their work with AR (\% of total hours of total training hours) 20/100\%. & Productivity increase of 10\% is seen. \\ An Augmented Reality System to Support Fault Visualization in Industrial Robotics Tasks [37] & The average time of the system to recognise the type of failure in a non-adaptive way in seconds 97.85 & The average time of the system to recognise the type of failure in an adaptive way in seconds 97.85 & A 26\% decrease in the time to recognise the fault is observed. \\ An Intelligent Product Service System for Adaptive Maintenance of Engineered-to-Order Manufacturing Equipment Assisted by Augmented Reality [34] & Inspection time in days = 2 and fault documentation time = 1.5 h & Inspection time in days = 1 and fault documentation time = 0.5 h & Reduction in mould inspection time by up to 50\% and fault documentation time by approximately 66\%. \\ \hline ARianae: Augmented Reality Based in Situ Annotation of Assembly Videos [38] & Time to annotate the assembly process with Ajalon (state-of-the-art video annotation tool) 17.6 min. & Time to annotate the assembly process with ARiana (AR-based video annotation tool) 5.2 & Implementing ARiana reduces the time to job approximately 70\%. \\ \hline Assessing User Performance in Augmented Reality Assembly Guidance for Industry 4.0 Operators [39] & Average time to complete assembly activity with AR 583 s & Average time to perform the assembly activity with AR 583 s & A 30.51\% reduction in the assembly activity is observed. \\ \hline Assessment of Augmented Reality in Mutual Writing Production Process with Use of Mobile AR Glasses [40] & Average time in minutes of assembly time without AR glasses by Tester 1: 17:40 and by Tester 2: 19:03 & Average time in minutes of the assembly duration with AR glasses by Tester 1: 17:40 and by Tester 2: 7:00 & By using AR glasses in the assembly process, a decrease of 37\% is observed for Tester 1 and 36\% for Tester 2. \\ \hline Augmented Reality for Industrial Quality Inspection: An Experiment Assersing Task Performance and Human Factors [41] & Task completion time and number of errors of a simple task with a display time: 630 s & Task completion time and number of errors of a task with AR time: 439 s & 30.31\% time reduction by using AR with an HMD device \\ \hline Augmented Reality System and Maintenance of Oil Pumps [21] & Average time performed during oil pump maintenance with manual instructions only 672 s. & Average time executed during oil pump maintenance with system recommendations = 424.5 & Using the recommendations of the AR system, a time reduction of 36.83\% could be seen. \\ \hline Augmented Reality-Assisted Deep Reinforcement Learning-Based Model towards Industrial Training and Maintenance for Nanodrop Spectrophotometer [42] & The accuracy of the [PERSON] et al. model and other 3D systems with geometry recognition using GAN is = 87.2\%. & Accuracy of the RL-PipTrack system: AR assisted deep RL-based model has an average Reward = 1000 + standard deviation = 0\%. & RL-PipTrack improves performance by approximately 14.68\% compared to the model of [PERSON] et al. \\ \hline \end{tabular}
\end{table} 
Table 3: _Cott._