<p class="TtuloAbstract">Since the creation of the demand-driven material requirement planning (DDMRP) model, numerous studies have analysed the methodology’s significant impact on different organisations. Several successful cases and research studies into DDMRP have demonstrated that the methodology is beneficial to organisations because it increases their service level and stock adjustments; however, there is a dearth of literature regarding the steps necessary to implement this model successfully. This document delivers a systematic review of the literature based on the work done by Kitchenham (2004) with the aim of analysing studies that investigate the standardization of the process of implementing the model. Once the lack of research has been demonstrated, a possible line of future research can be outlined to standardise the implementation process of the DDMRP model to achieve its full potential.</p>

Purpose: The theory of constraints (TOC) drum-buffer-rope methodology is appropriate when managing a production plant in complex environments, such as make-to-order (MTO) scenarios. However, some difficulties have been detected in implementing this methodology in such changing environments. This case study analyses a MTO company to identify the key factors that influence the execution of the third step of TOC. It also aims to evaluate in more depth the research started by Lizarralde et al. (2020) and compare the results with the existing literature.Design/methodology/approach: The case study approach is selected as a research methodology because of the need to investigate a current phenomenon in a real environment.Findings: In the case study analysed, the protective capacity of non-bottleneck resources is found to the key factor when subordinating the MTO system to a bottleneck (BN). Furthermore, it coincides with one of the two key factors defined by the literature, namely protective capacity and protective inventory.Originality/value: The three key contributions of this study focus on the MTO environment as follows. The first is about identifying the key factors in subordinating the system to the BN (step 3, TOC) according to the existing literature which have been identified through a systematic literature review. The second focuses on identifying the key factors in subordinating the system to the BN through a case study. Finally, the last contribution compares the results obtained in the case study with those obtained in the literature review.

The present study describes a methodology to apply the DOE (Design of Experiment) techniques. To show its application, a simple case was prepared that can be used as a training in industrial environments. In this case, fractional factorial designs were applied and the effects and interactions that influence the analyzed response were determined. The analysis of the data was done both manually and through the use of the statistical software MINITAB. The case study shown can be a useful tool to stimulate the use of DOE techniques in the industry. Keywords: Design of Experiment, DOE, training, factorial design, methodology.

Several authors agree on the importance of integrating sales and operations (S & OP) when it comes to improving the management of organisations. Thus, the relationship between S & OP can be critical from a competitive point of view, and therefore strategic. However, most of the literature on this topic focuses on the field of repetitive manufacturing. Consequently, this work aims to enhance the scarce literature related to S & OP in organisations that produce make-to-order (MTO). The present study is an analysis of cases of two industrial companies managed according to the theory of constraints. In both cases, the relationship between sales and operations was initially poor. Their approaches were mainly founded on their experience and intuition, as well as on simple data. The development of a new approach, integrating S & OP, has demonstrated the potential advantages of integrated management. As a result, we have identified some aspects of interest from a managerial perspective. Furthermore, we consider the findings of this study to be relevant to improving the competitiveness of this kind of organisation.

Purpose: The theory of constraints (TOC) methodology and its drum-buffer-rope (DBR) production planning and control system are well suited to managing production plants in complex environments. The objective of this study was to design an evolution of the systematic process for implementing the third step of the TOC methodology in make-to-order environments.Design/methodology/approach: Since the research concerned a real context and the phenomenon under investigation is contemporary, a case study was chosen as the research methodology.Findings: The study investigated, through a case study, the phases and steps necessary for the systematic process to be successfully implemented in a make-to-order environment.Originality/value: The three main contributions to the systematic implementation process for the third step of the TOC model are identified as the design of the last version of the systematic process, the integration of sales and operations through the TOC methodology and the introduction of the demand-driven adaptive enterprise model’s capacity buffer.