add cost, update budget constraint

qualities/B/_posts/2022-12-28-budget-constraint.md

@@ -1,7 +1,7 @@
 ---
 title: Budget constraint
 tags: suitable efficient
-related: efficiency, affordability
+related: efficiency, affordability, cost
 permalink: /qualities/budget-constraint
 ---
 

qualities/C/_posts/2022-12-28-cost.md

@@ -0,0 +1,15 @@
+---
+title: Cost
+tags: suitable efficient
+related: budget constraint, affordability
+permalink: /qualities/cost
+---
+
+
+>...the value of money that has been used up to produce something or deliver a service, and hence is not available for use anymore. 
+>
+>[Wikipedia]([/references/#volere](https://en.wikipedia.org/wiki/Cost))
+
+
+
+

qualities/T/_posts/2022-12-28-time-to-market.md

@@ -0,0 +1,18 @@
+---
+title: Time to Market
+tags: efficient
+related: flexibility, efficiency, deployment frequency, extensibility, lead time for changes, cycle time
+permalink: /qualities/time-to-market
+---
+
+<div class="arc42-help" markdown="1">
+
+Time to marketis the length of time it takes to bring a product or product-feature  from conception to production. 
+
+<hr>
+Time to market" in software engineering refers to the duration it takes to develop, test, and release a software product or feature from its initial conception. 
+It measures how quickly a software project can go from ideation to being available for users.
+
+A small or low time-to-market allows organizations to respond rapidly to market demands, gain a competitive edge, and deliver value to customers sooner.
+
+</div>