Collaborative design drives the specification and development of increasingly complex and varied support tools. Product Lifecycle Management (PLM) tools offer a wide range of features for collaborative design. These products bring users closer together by providing them with identical software platforms. In addition, the growing need for data reuse leads users to define rules and parameters to enrich their digital models to facilitate possible modifications. However, if expert software offers for the most part the possibilities of defining business rules, it is clear that no PLM, at to the present, offers functionalities of this type.
In this context, this article proposes to compare the main existing PLM architecture on the basis of technical and organizational criteria. This comparison makes it possible to identify a relevant architecture for the development of expert rule management functionalities integrated into the PLM application.

In Madhya Pradesh, a very large area of agricultural and forest land is thickly covered by noxious weed Lantana and the weed is still propagating. As analyzed by the experts Lantana possesses several qualities that could be of immense benefit to humans and animals. Mainly it is said that it can provide shelter to wild animals and plays a significant role in crop protection. Reviled as a nuisance and a menace worldwide, how could a weed is remotely thought of as being environmental friendly? Keeping above fact in mind, extensive survey was conducted in central zone of India during last two years for the assessment and collection of bio-control agents of lantana in the field. 21 species of phytophagous insects have been reported from lantana bushes. Half of the total species collected were Hemiptera, Coleoptera, with Tingidae, Chrysomelidae being the most important family. The present status of biological control of lantana in this region is reviewed together with the prospects of rearing some specific bio-control agents; Spilosoma obliqua and Euproctis subnotana (Walker) and pathogen spp Rhizopus and its effectiveness on lantana. As reported, these specific species are damaging the weed significantly in the field and prove to be a strenuous way for the entire eradication of this obnoxious weed from the environment.