Purpose Lean and Six Sigma are the two most important continuous improvement (CI) methodologies for achieving operational service excellence in any organization. The purpose of this paper is to explain how lean compares outline benefits integrating them. Also, discusses existing models that describe fit together. A new detailed description developed provide an improved approach CI. Design/methodology/approach following research included proposals discussion, which were mainly based on...

A study of the kinematic characteristics a three degree-of-freedom (dof) parallel mechanism is presented. The architecture comprised mobile platform attached to base through identical prismatic-revolute-spherical jointed serial linkages. prismatic joints are considered be actuated. These actuators lie on common plane and have radial directions action. mechanism’s inverse displacement solution obtained. Since has only 3 dof, constraint equations describing inter-relationship between six...

SUMMARY In this work, the 3- RP RR, a new kinematically redundant planar parallel manipulator with six-degrees-of-freedom, is presented. First, introduced and its inverse displacement problem discussed. Then, all types of singularities RR are analysed demonstrated. Thereafter, dexterous workspace geometrically obtained compared non-redundant P manipulator. Finally, based on geometrical measure proximity to singular configurations condition number manipulators' Jacobian matrices, actuation...

For organisations to be successful, the use of well-structured management systems (MSs), quality (QM) approach and methodologies for continuous improvement (CI) are all essential. Total (TQM) has been a dominant concept CI utilising Deming's concepts Plan-Do-Check-Act (PDCA). Lean Six Sigma (LSS) is widely-accepted methodology considered among most modern in 2000s. Recently, different MSs have gained more attention as they form critical infrastructure improving controlling operating areas...

Parallel manipulators feature relatively high payload and accuracy capabilities compared to their serial counterparts. However, they suffer from small workspace low maneuverability. Kinematic redundancy for parallel can improve both of these characteristics. This paper presents a family new kinematically redundant planar with six actuated-joint degrees freedom based on 3-PṞRR architecture obtained by adding an active prismatic joint at the base each limb 3-ṞRR manipulator. First, inverse...

Supply chain management (SCM) is essential for any company to survive the increasing pressures of global competition. There have been continuous changes in manufacturing and service markets, causing supply (SC) members reassess their effectiveness individually as a whole. A new evolution quality (QM) Lean Six Sigma (LSS), which improvement (CI) methodology that aims at customer satisfaction system waste reduction. SCM can utilise QM concepts well LSS tools CI principles achieve high levels...

Abstract Kinematic redundancy can be exploited to improve the performance of parallel mechanisms. Nevertheless, motion planning and control kinematically redundant mechanisms (KRPMs) are challenging problems. In this research, a novel class KRPMs with reconfigurable platform is introduced. The dynamic equations derived. Then, neural network approach used for manipulator in new class. multilayer perceptron-based (MLP) training data. results show that method implemented online mechanism. Also,...

Abstract This paper presents a kinematic analysis of three-degree-of-freedom parallel mechanism intended for use as telescope mirror focussing device. The construction the is first described and its forward inverse kinematics solutions are derived. Because has only three degrees freedom, constraint equations must be generated to describe inter-relationship between six Cartesian coordinates which position orientation moving platform. Once these constraints incorporated into model, constrained...

In this work, a new approach for motion planning of kinematically redundant parallel manipulators is proposed and compared with method previously by the authors called point-to-point (PPMP). Overall (OMP) consists determining actuation schemes that optimize manipulator’s performance while considering entire given trajectory end-effector at once. The results OMP are those PPMP manipulator. It shown strategy can generate trajectories such manipulator avoids singular configurations better than strategy.

Design cognition research aims to investigate the cognitive mechanisms and thought processes of human designers. In previous research, activity experienced inexperienced designers has been compared in order identify design strategies leading creativity. However, it is still unknown whether applied are effective efficiently improved. this paper, efficiency, describing how optimize mental resources achieve creativity conceptual processes, was directly measured by effort level outcomes. The...

A variety of definitions the workspace a mechanism can be found in literature. In this paper, dexterous is defined as subspace reachable having an adequate performance dexterity measure, e.g. condition number Jacobian matrix. The 3-DOF parallel analyzed. order to study changes volume architectural parameters are changed, several plots presented. shape, size and symmetry very dependent on particular set chosen for mechanism.