| RecapIn Part I of this series, we identified the gap between the expectations 
of traditional procurement specialists and the realistic needs of the software development community 
and introduced a new "progressive acquisition" approach that can help bridge this gap.  Part II provided a high-level description of how to modify the 
traditional contracting process to fit a progressive acquisition model that meets the needs 
of both acquirers and suppliers in a simplified scenario. We walked through the process of obtaining 
a system, software product, or software service,[1] through 
legal contract[2] from an independent supplier. In Part III we began looking at what actually goes into a contract, 
examining basic elements required for an effective contract and hurdles that tend to get in 
the way of constructing such a contract. We also looked at specific content required for the 
contracting approach we suggested in Part II, and the reasons most companies 
use a centralized acquisitions approach. Now, in Part IV, we will 
describe the variables that govern contract formulation[3] 
and then discuss how to choose the best form and type of contract to accommodate particular 
contract conditions. 1. ISO/IEC 12207 International Standard, Section 3: Definitions.
 2. Software Acquisition Capability Maturity Model, 1999: Appendix B: Glossary of Terms.
 3. NOTE: This article is not intended to offer definitive legal recommendations and advice, since these vary from country to country and jurisdiction to jurisdiction. In practice, all contract wording, whether "boiler plate" or specific to a contract, should be reviewed by competent acquisition personnel or legal advisors. For a detailed discussion of contract law refer to appropriate legal texts on the subject that are relevant to the governing jurisdiction.
 
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